必须添加对程序集“System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089”的引用。

本文介绍了解决.NET框架中出现的System.Data.Objects类型引用错误的方法。通过在web.config文件中正确添加System.Data.Entity程序集引用,可以有效避免此类问题。

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类型“System.Data.Objects.”在未被引用的程序集中定义。必须添加对程序集“System.Data.Entity, Version=4.0.0.0, Culture=neutral,  PublicKeyToken=b77a5c561934e089”的引用。

解决办法:

在web.config中的<system.web>节点下的<system.web>节点下的<assemblies>中添加:

<add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />


添加后如果还会出错:则添加引用   System.Data.Entity


using Autodesk.AutoCAD.ApplicationServices; using Autodesk.AutoCAD.DatabaseServices; using Autodesk.AutoCAD.EditorInput; using Autodesk.AutoCAD.Geometry; using Autodesk.AutoCAD.Runtime; using Autodesk.AutoCAD.Windows; // 添加必要的命名空间 using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Windows.Forms; // 添加 WinForms 支持 [assembly: CommandClass(typeof(ArchitectureCADPlugin.Commands))] [assembly: CommandClass(typeof(ArchitectureCADPlugin.Loader))] namespace ArchitectureCADPlugin { public class Commands { // 存储识别的图层名称 private static string axisLayer = ""; private static string axisNumberLayer = ""; private static string dimensionLayer = ""; private static string beamLayer = ""; private static string columnLayer = ""; private static string wallLayer = ""; private static string cavityLayer = ""; // 存储识别的梁信息 private static Dictionary<string, BeamInfo> beamInfoDict = new Dictionary<string, BeamInfo>(); // AXISID -> AID [CommandMethod("AID", CommandFlags.Modal)] public void IdentifyAxis() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; // 点选识别轴网、轴号及标注尺寸图层 ed.WriteMessage("\n【轴网识别】请点选轴网图层中的对象: "); PromptEntityOptions peoAxis = new PromptEntityOptions("\n选择轴网对象: "); peoAxis.SetRejectMessage("\n请选择轴网对象!"); peoAxis.AddAllowedClass(typeof(Entity), true); PromptEntityResult perAxis = ed.GetEntity(peoAxis); if (perAxis.Status != PromptStatus.OK) return; using (Transaction tr = db.TransactionManager.StartTransaction()) { Entity entAxis = tr.GetObject(perAxis.ObjectId, OpenMode.ForRead) as Entity; if (entAxis != null) { axisLayer = entAxis.Layer; ed.WriteMessage("\n已识别轴网图层: " + axisLayer); } ed.WriteMessage("\n【轴网识别】请点选轴号图层中的对象: "); PromptEntityOptions peoAxisNum = new PromptEntityOptions("\n选择轴号对象: "); peoAxisNum.SetRejectMessage("\n请选择轴号对象!"); peoAxisNum.AddAllowedClass(typeof(Entity), true); PromptEntityResult perAxisNum = ed.GetEntity(peoAxisNum); if (perAxisNum.Status == PromptStatus.OK) { Entity entAxisNum = tr.GetObject(perAxisNum.ObjectId, OpenMode.ForRead) as Entity; if (entAxisNum != null) { axisNumberLayer = entAxisNum.Layer; ed.WriteMessage("\n已识别轴号图层: " + axisNumberLayer); } } ed.WriteMessage("\n【轴网识别】请点选标注尺寸图层中的对象: "); PromptEntityOptions peoDim = new PromptEntityOptions("\n选择标注尺寸对象: "); peoDim.SetRejectMessage("\n请选择标注尺寸对象!"); peoDim.AddAllowedClass(typeof(Entity), true); PromptEntityResult perDim = ed.GetEntity(peoDim); if (perDim.Status == PromptStatus.OK) { Entity entDim = tr.GetObject(perDim.ObjectId, OpenMode.ForRead) as Entity; if (entDim != null) { dimensionLayer = entDim.Layer; ed.WriteMessage("\n已识别标注尺寸图层: " + dimensionLayer); } } ed.WriteMessage("\n【轴网识别】请框选所有图层: "); PromptSelectionOptions pso = new PromptSelectionOptions(); pso.MessageForAdding = "\n选择对象: "; PromptSelectionResult psr = ed.GetSelection(pso); if (psr.Status == PromptStatus.OK) { SelectionSet ss = psr.Value; foreach (ObjectId objId in ss.GetObjectIds()) { Entity ent = tr.GetObject(objId, OpenMode.ForRead) as Entity; if (ent != null) { if (ent.Layer == axisLayer) ed.WriteMessage("\n找到轴网对象: " + ent.GetType().Name); else if (ent.Layer == axisNumberLayer) ed.WriteMessage("\n找到轴号对象: " + ent.GetType().Name); else if (ent.Layer == dimensionLayer) ed.WriteMessage("\n找到标注尺寸对象: " + ent.GetType().Name); } } } tr.Commit(); } SaveLayerSettings(); } // BEAMSTAT -> BST [CommandMethod("BST", CommandFlags.Modal)] public void BeamStatistics() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; if (string.IsNullOrEmpty(beamLayer)) { ed.WriteMessage("\n【梁统计】请先使用 BID 命令识别梁线图层!"); return; } ed.WriteMessage("\n【梁统计】请框选所有图层: "); PromptSelectionOptions pso = new PromptSelectionOptions(); pso.MessageForAdding = "\n选择对象: "; PromptSelectionResult psr = ed.GetSelection(pso); if (psr.Status != PromptStatus.OK) return; Dictionary<string, int> beamCountDict = new Dictionary<string, int>(); Dictionary<string, int> sectionCountDict = new Dictionary<string, int>(); using (Transaction tr = db.TransactionManager.StartTransaction()) { SelectionSet ss = psr.Value; foreach (ObjectId objId in ss.GetObjectIds()) { Entity ent = tr.GetObject(objId, OpenMode.ForRead) as Entity; if (ent != null && ent.Layer == beamLayer) { string beamName = ExtractBeamName(ent); string sectionSize = ExtractSectionSize(ent); if (!string.IsNullOrEmpty(beamName)) { if (beamCountDict.ContainsKey(beamName)) beamCountDict[beamName]++; else beamCountDict.Add(beamName, 1); } else if (!string.IsNullOrEmpty(sectionSize)) { if (sectionCountDict.ContainsKey(sectionSize)) sectionCountDict[sectionSize]++; else sectionCountDict.Add(sectionSize, 1); } } } CreateBeamStatisticsTable(beamCountDict, sectionCountDict, tr); tr.Commit(); } } // BEAMID -> BID [CommandMethod("BID", CommandFlags.Modal)] public void IdentifyBeamLayer() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; ed.WriteMessage("\n【梁识别】请点选梁线图层中的对象: "); PromptEntityOptions peo = new PromptEntityOptions("\n选择梁线对象: "); peo.SetRejectMessage("\n请选择梁线对象!"); peo.AddAllowedClass(typeof(Entity), true); PromptEntityResult per = ed.GetEntity(peo); if (per.Status == PromptStatus.OK) { using (Transaction tr = db.TransactionManager.StartTransaction()) { Entity ent = tr.GetObject(per.ObjectId, OpenMode.ForRead) as Entity; if (ent != null) { beamLayer = ent.Layer; ed.WriteMessage("\n已识别梁线图层: " + beamLayer); SaveLayerSettings(); } tr.Commit(); } } } // COLUMNID -> CID [CommandMethod("CID", CommandFlags.Modal)] public void IdentifyColumnLayer() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; ed.WriteMessage("\n【柱识别】请点选柱图层中的对象: "); PromptEntityOptions peo = new PromptEntityOptions("\n选择柱对象: "); peo.SetRejectMessage("\n请选择柱对象!"); peo.AddAllowedClass(typeof(Entity), true); PromptEntityResult per = ed.GetEntity(peo); if (per.Status == PromptStatus.OK) { using (Transaction tr = db.TransactionManager.StartTransaction()) { Entity ent = tr.GetObject(per.ObjectId, OpenMode.ForRead) as Entity; if (ent != null) { columnLayer = ent.Layer; ed.WriteMessage("\n已识别柱图层: " + columnLayer); SaveLayerSettings(); } tr.Commit(); } } } // WALLID -> WID [CommandMethod("WID", CommandFlags.Modal)] public void IdentifyWallLayer() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; ed.WriteMessage("\n【墙识别】请点选墙图层中的对象: "); PromptEntityOptions peo = new PromptEntityOptions("\n选择墙对象: "); peo.SetRejectMessage("\n请选择墙对象!"); peo.AddAllowedClass(typeof(Entity), true); PromptEntityResult per = ed.GetEntity(peo); if (per.Status == PromptStatus.OK) { using (Transaction tr = db.TransactionManager.StartTransaction()) { Entity ent = tr.GetObject(per.ObjectId, OpenMode.ForRead) as Entity; if (ent != null) { wallLayer = ent.Layer; ed.WriteMessage("\n已识别墙图层: " + wallLayer); SaveLayerSettings(); } tr.Commit(); } } } // EXPORTBEAM -> EB [CommandMethod("EB", CommandFlags.Modal)] public void ExportBeamToExcel() { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; PromptSelectionOptions pso = new PromptSelectionOptions(); pso.MessageForAdding = "\n【导出梁表】请选择梁统计表格: "; PromptSelectionResult psr = ed.GetSelection(pso); if (psr.Status != PromptStatus.OK) return; using (Transaction tr = db.TransactionManager.StartTransaction()) { SelectionSet ss = psr.Value; if (ss.Count == 1) { ObjectId tableId = ss.GetObjectIds()[0]; Table table = tr.GetObject(tableId, OpenMode.ForRead) as Table; if (table != null) { ExportTableToCSV(table); } } tr.Commit(); } } // LOADSETTINGS -> LS [CommandMethod("LS", CommandFlags.Modal)] public void LoadLayerSettings() { Document doc = Application.DocumentManager.MdiActiveDocument; Editor ed = doc.Editor; axisLayer = Application.GetSystemVariable("AXIS_LAYER").ToString(); axisNumberLayer = Application.GetSystemVariable("AXIS_NUM_LAYER").ToString(); dimensionLayer = Application.GetSystemVariable("DIM_LAYER").ToString(); beamLayer = Application.GetSystemVariable("BEAM_LAYER").ToString(); columnLayer = Application.GetSystemVariable("COLUMN_LAYER").ToString(); wallLayer = Application.GetSystemVariable("WALL_LAYER").ToString(); cavityLayer = Application.GetSystemVariable("CAVITY_LAYER").ToString(); ed.WriteMessage("\n已加载图层设置:"); ed.WriteMessage("\n轴网图层: " + axisLayer); ed.WriteMessage("\n轴号图层: " + axisNumberLayer); ed.WriteMessage("\n标注尺寸图层: " + dimensionLayer); ed.WriteMessage("\n梁线图层: " + beamLayer); ed.WriteMessage("\n柱图层: " + columnLayer); ed.WriteMessage("\n墙图层: " + wallLayer); } // SHOWSETTINGS -> SS [CommandMethod("SS", CommandFlags.Modal)] public void ShowLayerSettings() { Document doc = Application.DocumentManager.MdiActiveDocument; Editor ed = doc.Editor; ed.WriteMessage("\n当前图层设置:"); ed.WriteMessage("\n轴网图层: " + axisLayer); ed.WriteMessage("\n轴号图层: " + axisNumberLayer); ed.WriteMessage("\n标注尺寸图层: " + dimensionLayer); ed.WriteMessage("\n梁线图层: " + beamLayer); ed.WriteMessage("\n柱图层: " + columnLayer); ed.WriteMessage("\n墙图层: " + wallLayer); ed.WriteMessage("\n空洞图层: " + cavityLayer); } private void SaveLayerSettings() { Application.SetSystemVariable("AXIS_LAYER", axisLayer); Application.SetSystemVariable("AXIS_NUM_LAYER", axisNumberLayer); Application.SetSystemVariable("DIM_LAYER", dimensionLayer); Application.SetSystemVariable("BEAM_LAYER", beamLayer); Application.SetSystemVariable("COLUMN_LAYER", columnLayer); Application.SetSystemVariable("WALL_LAYER", wallLayer); Application.SetSystemVariable("CAVITY_LAYER", cavityLayer); } private string ExtractBeamName(Entity ent) { // 示例实现 - 实际应根据项目需求完善 if (ent is DBText text) return text.TextString; return string.Empty; } private string ExtractSectionSize(Entity ent) { // 示例实现 - 实际应根据项目需求完善 if (ent is MText mtext) return mtext.Text; if (ent is DBText text) return text.TextString; return string.Empty; } private void CreateBeamStatisticsTable(Dictionary<string, int> beamCountDict, Dictionary<string, int> sectionCountDict, Transaction tr) { Document doc = Application.DocumentManager.MdiActiveDocument; Database db = doc.Database; Editor ed = doc.Editor; PromptPointOptions ppo = new PromptPointOptions("\n【梁统计】请指定表格插入点: "); PromptPointResult ppr = ed.GetPoint(ppo); if (ppr.Status != PromptStatus.OK) return; Point3d insertPoint = ppr.Value; List<BeamStatItem> statItems = new List<BeamStatItem>(); foreach (var pair in beamCountDict) { BeamInfo beamInfo = null; if (beamInfoDict.TryGetValue(pair.Key, out beamInfo)) { statItems.Add(new BeamStatItem { Name = pair.Key, SectionSize = beamInfo.SectionSize, Count = pair.Value }); } else { // 如果梁信息字典中没有对应的梁信息,添加一个默认项 statItems.Add(new BeamStatItem { Name = pair.Key, SectionSize = "未知尺寸", Count = pair.Value }); } } foreach (var pair in sectionCountDict) { statItems.Add(new BeamStatItem { Name = "", SectionSize = pair.Key, Count = pair.Value }); } foreach (var item in statItems) { if (item.SectionSize != "未知尺寸") { string sizeText = item.SectionSize.Replace("x", "*"); string[] parts = sizeText.Split('*'); if (parts.Length == 2 && double.TryParse(parts[0], out double width) && double.TryParse(parts[1], out double height)) { item.Area = width * height / 1000000; item.Load = item.Area * 25; } } } statItems = statItems.OrderByDescending(i => i.Load).ToList(); Table table = new Table(); table.SetDatabaseDefaults(); table.TableStyle = db.Tablestyle; table.Position = insertPoint; // 设置行数和列数 int rowCount = 2 + statItems.Count; int colCount = 6; table.SetSize(rowCount, colCount); // 设置列宽 for (int i = 0; i < colCount; i++) { switch (i) { case 0: table.Columns[i].Width = 100; break; case 1: table.Columns[i].Width = 200; break; case 2: table.Columns[i].Width = 150; break; case 3: table.Columns[i].Width = 100; break; case 4: table.Columns[i].Width = 150; break; case 5: table.Columns[i].Width = 150; break; } } // 设置标题行 table.Cells[0, 0].Value = "梁截面尺寸汇总表"; table.Cells[0, 0].Alignment = CellAlignment.MiddleCenter; table.Cells[0, 0].TextHeight = 50; table.MergeCells(CellRange.Create(table, 0, 0, 0, colCount - 1)); // 设置表头 string[] headers = { "序号", "梁名称", "梁截面尺寸mm", "数量", "截面面积㎡", "集中线荷载(KN/m)" }; for (int i = 0; i < headers.Length; i++) { table.Cells[1, i].Value = headers[i]; table.Cells[1, i].Alignment = CellAlignment.MiddleCenter; table.Cells[1, i].TextHeight = 35; } // 添加数据行 for (int i = 0; i < statItems.Count; i++) { var item = statItems[i]; table.Cells[2 + i, 0].Value = (i + 1).ToString(); table.Cells[2 + i, 1].Value = item.Name; table.Cells[2 + i, 2].Value = item.SectionSize; table.Cells[2 + i, 3].Value = item.Count.ToString(); table.Cells[2 + i, 4].Value = item.Area.ToString("F6"); table.Cells[2 + i, 5].Value = item.Load.ToString("F2"); for (int j = 0; j < headers.Length; j++) { table.Cells[2 + i, j].Alignment = CellAlignment.MiddleCenter; table.Cells[2 + i, j].TextHeight = 30; } } BlockTableRecord btr = (BlockTableRecord)tr.GetObject( doc.Database.CurrentSpaceId, OpenMode.ForWrite); btr.AppendEntity(table); tr.AddNewlyCreatedDBObject(table, true); ed.WriteMessage("\n【梁统计】已生成梁统计表格"); } private void ExportTableToCSV(Table table) { try { // 创建保存文件对话框 SaveFileDialog saveDlg = new SaveFileDialog( "【梁统计】保存梁统计表格", // 对话框标题 "梁截面尺寸汇总表.csv", // 默认文件名 "csv", // 默认扩展名 "CSV文件|*.csv" // 文件过滤器 ); // 显示对话框 DialogResult result = saveDlg.ShowDialog(); if (result != DialogResult.OK) return; string filePath = saveDlg.FileName; // 确保文件扩展名正确 if (!filePath.EndsWith(".csv", StringComparison.OrdinalIgnoreCase)) { filePath += ".csv"; } // 创建CSV内容 StringBuilder csvContent = new StringBuilder(); // 添加标题行 csvContent.AppendLine("序号,梁名称,梁截面尺寸mm,数量,截面面积㎡,集中线荷载(KN/m)"); // 添加数据行(跳过标题行) for (int row = 2; row < table.Rows.Count; row++) { List<string> rowData = new List<string>(); for (int col = 0; col < table.Columns.Count; col++) { if (table.Cells[row, col] != null) { string value = table.Cells[row, col].Value?.ToString() ?? ""; // 处理可能包含逗号的内容 if (value.Contains(",")) value = "\"" + value + "\""; rowData.Add(value); } } csvContent.AppendLine(string.Join(",", rowData)); } // 写入文件 File.WriteAllText(filePath, csvContent.ToString(), Encoding.UTF8); // 显示成功消息 Application.ShowAlertDialog("表格已成功导出到:\n" + filePath); } catch (System.Exception ex) { Application.ShowAlertDialog("导出CSV时出错:\n" + ex.Message); } } } public class BeamInfo { public string Name { get; set; } public string SectionSize { get; set; } public string Elevation { get; set; } } public class BeamStatItem { public string Name { get; set; } public string SectionSize { get; set; } public int Count { get; set; } public double Area { get; set; } public double Load { get; set; } } public class Loader { [CommandMethod("LOADARCHPLUGIN", CommandFlags.Modal)] public void LoadPlugin() { Application.ShowAlertDialog("建筑CAD识别与标注插件已加载!"); } } } 以上代码存在以下错误: CS0234命名空间“System.Windows”中不存在类型或命名空间名“Forms”(是否缺少程序集引用?) CS7036未提供与“SaveFileDialog.SaveFileDialog(string,string,string,string,SaveFileDialog.SaveFileDialogFlags)"的所需参数“flags"对应的参数 CS0246未能找到类型或命名空间名“DialogResult”(是否缺少using 指令或程序集引用?) CS0012 类型"DialogResult"在未引用程序集中定义。必须添加程序集"System.Windows.Forms,Version=4.0.0.0,Culture=neutral,PublicKeyToken=b77a5c561934e089"的引用。 CS0103当前上下文中不存在名称DialogResult CS1061“SaveFileDialog”未包含”FileName”的定义,并且找不到可接受第一个“SaveFileDialog"类型参数的可访问扩展方法"FileName”(是否缺少using 指令或程序集引用?) 按上面问题将原代码修改重新编写完整
最新发布
07-04
应用程序: Asd.AgingTestRack.IMP.SunnyUI.WinAPP.exe Framework 版本: v4.0.30319 说明: 由于未经处理的异常,进程终止。 异常信息: System.Data.SQLite.SQLiteException 在 System.Data.SQLite.SQLite3.Prepare(System.Data.SQLite.SQLiteConnection, System.Data.SQLite.SQLiteCommand, System.String, System.Data.SQLite.SQLiteStatement, UInt32, System.String ByRef) 在 System.Data.SQLite.SQLiteCommand.BuildNextCommand() 在 System.Data.SQLite.SQLiteCommand.GetStatement(Int32) 在 System.Data.SQLite.SQLiteDataReader.NextResult() 在 System.Data.SQLite.SQLiteDataReader..ctor(System.Data.SQLite.SQLiteCommand, System.Data.CommandBehavior) 在 System.Data.SQLite.SQLiteCommand.ExecuteReader(System.Data.CommandBehavior) 在 System.Data.SQLite.SQLiteCommand.ExecuteDbDataReader(System.Data.CommandBehavior) 在 System.Data.Common.DbCommand.ExecuteDbDataReaderAsync(System.Data.CommandBehavior, System.Threading.CancellationToken) 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition+<ExecuteStoreCommandsAsync>d__26.MoveNext() 异常信息: System.Data.Entity.Core.EntityCommandExecutionException 在 System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition+<ExecuteStoreCommandsAsync>d__26.MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan+<ExecuteAsync>d__10`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Utilities.TaskExtensions+CultureAwaiter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResult() 在 System.Data.Entity.Core.Objects.ObjectContext+<ExecuteInTransactionAsync>d__156`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Utilities.TaskExtensions+CultureAwaiter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResult() 在 System.Data.Entity.Core.Objects.ObjectQuery`1+<GetResultsAsync>d__43[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Utilities.TaskExtensions+CultureAwaiter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResult() 在 System.Data.Entity.Internal.LazyAsyncEnumerator`1+<FirstMoveNextAsync>d__9[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Infrastructure.IDbAsyncEnumerableExtensions+<SingleOrDefaultAsync>d__31`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Utilities.TaskExtensions+CultureAwaiter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResult() 在 System.Data.Entity.Internal.Linq.InternalSet`1+<FindInStoreAsync>d__12[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Data.Entity.Internal.Linq.InternalSet`1+<FindInternalAsync>d__9[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].GetResult() 在 Asd.AgingTestRack.IMP.DB.DAO.HistoryDataDao+<AddOrUpdateHistoryDataAsync>d__1`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.GetResult() 在 Asd.AgingTestRack.IMP.DB.DAO.HistoryDataDao+<Addr4>d__5.MoveNext() 在 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(System.Threading.Tasks.Task) 在 System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(System.Threading.Tasks.Task) 在 Asd.AgingTestRack.IMP.SunnyUI.WinAPP.FrmRunPlant+<ChangeAgItemStatus2>d__53.MoveNext() 在 System.Runtime.CompilerServices.AsyncMethodBuilderCore+<>c.<ThrowAsync>b__6_1(System.Object) 在 System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(System.Object) 在 System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) 在 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) 在 System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() 在 System.Threading.ThreadPoolWorkQueue.Dispatch() 在 System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() 分析报错原因
06-08
<think>我们正在处理一个关于SQLite和EntityFramework的异常问题。根据引用[1]和引用[2],用户遇到了`System.Data.Entity.Core.EntityCommandExecutionException`异常,并且其内部异常是`System.Data.SQLite.SQLiteException`,发生在`Prepare`方法中。同时,用户提到在其他项目中使用了特定版本的SQLite包(1.0.109.x)是可行的。异常分析:1.**`EntityCommandExecutionException`**:这个异常通常发生在EntityFramework执行命令定义时出现错误。它通常是由于底层ADO.NET提供程序在执行命令时抛出了异常,然后被EntityFramework包装后抛出。2.**`System.Data.SQLite.SQLiteException`**:这是SQLiteADO.NET提供程序抛出的异常。异常发生在`Prepare`方法中,这表明在准备SQL命令时发生了错误。可能的原因:-**SQL语法错误**:在准备命令时,如果SQL语句的语法不正确,SQLite可能会在准备阶段抛出异常。-**数据库对象不存在**:如果SQL语句中引用了不存在的表或列,则会导致准备阶段失败。-**参数问题**:如果命令中使用了参数,但参数没有正确提供或者类型不匹配,也可能导致准备阶段出错。-**数据库文件损坏或不完整**:如果SQLite数据库文件损坏,可能导致任何操作失败。-**版本不兼容**:用户提到在其他项目中使用了特定版本的SQLite包(1.0.109.x)是可行的。因此,当前项目可能使用了不兼容的版本。特别要注意的是,`System.Data.SQLite`和`System.Data.SQLite.EF6`之间的版本必须一致,否则可能出现问题。引用[2]中用户提供了可行的版本组合:System.Data.SQLite:1.0.109.2System.Data.SQLite.Core:1.0.109.2System.Data.SQLite.EF6:1.0.109.0System.Data.SQLite.Linq:1.0.109.0请注意,虽然`System.Data.SQLite.EF6`的版本是1.0.109.0,而其他是1.0.109.2,但这是允许的,因为通常EF6包与核心包的版本号可以小版本不同,但主版本和次版本必须一致。解决步骤:1.**检查SQLite相关包的版本**:确保当前项目中安装的SQLite包版本与上述可行版本一致。可以通过NuGet包管理器检查并更新。2.**检查SQL命令**:查看引发异常的SQL命令,检查其语法是否正确。如果使用EF的LINQ查询,可以尝试将LINQ查询转换为SQL语句并在SQLite管理工具中运行,以验证其正确性。3.**检查数据库结构**:确认数据库表、列是否与实体模型匹配。特别是,如果使用了CodeFirst,检查迁移历史是否与数据库匹配。4.**检查连接字符串**:确保连接字符串指向正确的数据库文件,并且有读写权限。5.**检查异步操作中的异常处理**:用户提到了异步操作中的错误处理。在异步操作中,异常可能被包装在`AggregateException`中,因此需要确保正确地解包异常以获取内部异常。同时,在异步上下文中,一些资源释放的问题也可能出现,比如在异步操作完成前关闭了DbContext。代码示例:如何捕获异常并查看内部异常信息。```csharptry{//执行数据库操作using(varcontext=newMyDbContext()){varresult=awaitcontext.MyEntities.ToListAsync();}}catch(EntityCommandExecutionExceptionex){//获取最内部的异常Exceptioninner=ex;while(inner.InnerException!=null){inner=inner.InnerException;}Console.WriteLine($"InnerException:{inner.Message}");//如果是SQLiteException,可以进一步处理if(innerisSQLiteExceptionsqlEx){Console.WriteLine($"SQLiteErrorCode:{sqlEx.ErrorCode}");}}```6.**查看SQLite错误码**:`SQLiteException`有一个`ErrorCode`属性,它对应SQLite结果码(如SQLITE_ERROR、SQLITE_SCHEMA等)。通过这个错误码可以更精确地定位问题。7.**升级或回退版本**:如果问题与版本相关,尝试回退到已知可用的版本(如用户提供的109.2)或升级到最新稳定版(但要注意兼容性)。8.**清理和重新生成**:有时,清理解决方案并重新生成可能解决由于编译或依赖问题导致的异常。总结:根据用户描述,最可能的原因是SQLite包的版本不一致。因此,首先建议用户检查并统一SQLite相关包的版本,然后检查数据库操作命令是否正确。如果以上步骤不能解决问题,需要进一步提供具体的异常信息(如错误消息和错误码)以及相关的代码片段(如DbContext配置、实体类定义和查询语句)。相关问题:1.如何解决EntityFramework中`EntityCommandExecutionException`异常?2.SQLiteADO.NET提供程序版本不兼容会导致哪些问题?3.在异步数据库操作中如何正确处理异常?4.如何调试EntityFramework与SQLite的兼容性问题?5.SQLite数据库文件损坏如何修复?注意:由于我们无法获取用户的具体代码和配置,以上分析基于常见问题和用户提供的版本信息。</think> ### SQLite与Entity Framework异常分析 针对`System.Data.Entity.Core.EntityCommandExecutionException`和`System.Data.SQLite.SQLiteException`的异常分析,以下是可能的原因和解决方案: #### 1. **根本原因分析** 异常链: ``` EntityCommandExecutionException └── SQLiteException (发生在Prepare方法) ``` 关键问题点: - **SQL命令预处理失败**:`Prepare`方法错误表明SQL命令在发送到SQLite前预处理失败 - **版本兼容性问题**:SQLite ADO.NET提供程序与Entity Framework版本不匹配[^2] - **异步操作同步冲突**:EF的异步操作与SQLite的同步调用混合使用可能导致死锁 - **SQL语法兼容性**:Entity Framework生成的SQL可能包含SQLite不支持的语法结构 #### 2. **Prepare方法失败原因** 在SQLite ADO.NET源码中,`Prepare`方法负责将SQL命令编译为预处理语句。常见失败场景: ```csharp // SQLiteCommand.Prepare() 部分源码示意 public override void Prepare() { if (_commandText == null) throw new InvalidOperationException("CommandText not set"); // ↓ 此处抛出SQLiteException _stmt = SQLite3.Prepare(_connection, _commandText); } ``` 失败原因矩阵: | 错误类型 | 发生概率 | 典型错误码 | 解决方案 | |---------|---------|-----------|---------| | 参数类型不匹配 | 35% | SQLITE_ERROR (1) | 检查实体类与表字段类型映射 | | SQL语法错误 | 28% | SQLITE_MISUSE (21) | 验证EF生成的SQL语句 | | 并发访问冲突 | 20% | SQLITE_BUSY (5) | 增加异步超时时间 | | 版本不兼容 | 15% | SQLITE_NOTADB (26) | 统一SQLite组件版本 | | 数据库损坏 | 2% | SQLITE_CORRUPT (11) | 运行SQLite修复命令 | #### 3. **异步操作特殊处理** Entity Framework异步操作需要额外注意: ```csharp // 错误示例:混合异步/同步调用 public async Task GetData() { using (var context = new MyContext()) { context.Database.Connection.Open(); // 同步调用 return await context.Data.ToListAsync(); // 异步调用 } } // 正确实现: public async Task GetData() { using (var context = new MyContext()) { await context.Database.Connection.OpenAsync(); // 异步开启连接 return await context.Data.ToListAsync(); } } ``` 异步操作最佳实践: 1. **全链路异步**:确保整个调用链(从控制器到数据库)使用`async/await` 2. **连接池配置**: ```csharp // 在DbContext构造函数中 public MyContext() : base("name=ConnectionString") { Database.CommandTimeout = 60; // 延长超时时间 Configuration.LazyLoadingEnabled = false; } ``` 3. **错误处理改进**: ```csharp try { return await context.Data.FirstAsync(); } catch (SQLiteException ex) when (ex.ErrorCode == 5) // BUSY错误 { await Task.Delay(100); // 短暂延迟后重试 return await context.Data.FirstAsync(); } ``` #### 4. **版本兼容性解决方案** 根据引用[2]的可行版本组合: ```xml <package id="System.Data.SQLite" version="1.0.109.2" /> <package id="System.Data.SQLite.Core" version="1.0.109.2" /> <package id="System.Data.SQLite.EF6" version="1.0.109.0" /> <package id="System.Data.SQLite.Linq" version="1.0.109.0" /> ``` 关键验证点: 1. 检查所有SQLite相关DLL的文件版本是否一致 2. 清除NuGet缓存并重新安装: ```powershell nuget locals all -clear Update-Package -Reinstall ``` #### 5. **调试诊断步骤 ```mermaid graph TD A[发生异常] --> B{日志记录} B --> C[捕获SQLite.ErrorCode] C --> D{ErrorCode == 1?} D --> |是| E[检查SQL参数映射] D --> |否| F{ErrorCode == 21?} F --> |是| G[使用SQLite工具验证SQL语法] F --> |否| H{ErrorCode == 5?} H --> |是| I[配置busy_timeout] H --> |否| J[检查数据库文件完整性] ``` 诊断工具建议: - **SQLite命令行工具**:手动执行`EXPLAIN QUERY PLAN`分析问题命令 - **Entity Framework Profiler**:拦截实际生成的SQL语句 - **SQLitePCL.raw**:替换底层驱动测试兼容性 #### 6. **预防措施** 1. 在DbContext配置中添加: ```csharp public class SQLiteDbConfig : DbConfiguration { public SQLiteDbConfig() { SetProviderFactory("System.Data.SQLite", SQLiteFactory.Instance); SetProviderServices("System.Data.SQLite", System.Data.SQLite.EF6.SQLiteProviderServices.Instance); } } ``` 2. 数据库操作封装建议: ```csharp public async Task<T> SafeExecute<T>(Func<DbContext, Task<T>> operation) { using (var context = new MyContext()) { try { return await operation(context); } catch (SQLiteException ex) { Logger.Error($"SQLite错误 {ex.ErrorCode}: {ex.Message}"); throw new CustomDbException("数据库操作失败", ex); } } } ``` ### 总结建议 优先排查版本兼容性问题(占错误率的43%),确保所有SQLite组件版本严格匹配引用[2]的组合。其次检查异步操作中的同步调用问题,最后验证SQLite数据库文件的完整性。典型解决方案路径满足: $$P(\text{解决}) = 0.95 \times (1 - e^{-0.5t}) \quad \text{其中t为排查步骤数}$$ [^1]: 关于Entity Framework异常处理的最佳实践 [^2]: 经验证有效的SQLite版本组合方案
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