C#中DataTable、Dataset转Json和Json转DataTable

最新推荐文章于 2023-10-24 14:24:32 发布

shoot_your_face

最新推荐文章于 2023-10-24 14:24:32 发布

阅读量1.2k

点赞数 1

CC 4.0 BY-SA版权

分类专栏： C# 文章标签： C# Json

本文链接：https://blog.youkuaiyun.com/shoot_your_face/article/details/47038317

C# 专栏收录该内容

3 篇文章

订阅专栏

本文介绍如何实现JSON格式与DataTable之间的相互转换，包括从JSON字符串还原为DataTable结构，以及将DataTable转换为JSON格式的方法。

#region dataTable转换成Json格式
/// <summary>
/// dataTable转换成Json格式
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static string DataTable2Json(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
string str=null;
try
{
jsonBuilder.Append("{\"");
jsonBuilder.Append(dt.TableName);
jsonBuilder.Append("\":[");
for (int i = 0; i < dt.Rows.Count; i++)
{
jsonBuilder.Append("{");
for (int j = 0; j < dt.Columns.Count; j++)
{
jsonBuilder.Append("\"");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("\":\"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("\",");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("},");
}
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
jsonBuilder.Append("]");
jsonBuilder.Append("}");
}
catch
{
return str;
}

return jsonBuilder.ToString();
}

#endregion dataTable转换成Json格式

#region DataSet转换成Json格式
/// <summary>
/// DataSet转换成Json格式
/// </summary>
/// <param name="ds">DataSet</param>
/// <returns></returns>
public static string Dataset2Json(DataSet ds)
{
string str = null;
StringBuilder json = new StringBuilder();
try
{

json.Append("{\"");
json.Append(ds.DataSetName);
json.Append("\":[");
foreach (DataTable dt in ds.Tables)
{
json.Append("{\"");
json.Append(dt.TableName);
json.Append("\":");
json.Append(DataTable2Json(dt));
json.Append("}");
json.Append(",");
}
json.Remove(json.Length - 1, 1);
json.Append("]");
json.Append("}");
}
catch
{
return str;
}

return json.ToString();
}
#endregion

#region Json 转换为DataTable
/// <summary>
/// 将json转换为DataTable
/// </summary>
/// <param name="strJson">得到的json</param>
/// <returns></returns>
public static DataTable JsonToDataTable(string strJson)
{
DataTable tb = null;
try
{
//转换json格式
strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();
//取出表名
var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
string strName = rg.Match(strJson).Value;

//去除表名
strJson = strJson.Substring(strJson.IndexOf("[") + 1);
strJson = strJson.Substring(0, strJson.IndexOf("]"));

//获取数据
rg = new Regex(@"(?<={)[^}]+(?=})");
MatchCollection mc = rg.Matches(strJson);
for (int i = 0; i < mc.Count; i++)
{
string strRow = mc[i].Value;
string[] strRows = strRow.Split('*');

//创建表
if (tb == null)
{
tb = new DataTable();
tb.TableName = strName;
foreach (string str in strRows)
{
var dc = new DataColumn();
string[] strCell = str.Split('#');

if (strCell[0].Substring(0, 1) == "\"")
{
int a = strCell[0].Length;
dc.ColumnName = strCell[0].Substring(1, a - 2);
}
else
{
dc.ColumnName = strCell[0];
}
tb.Columns.Add(dc);
}
tb.AcceptChanges();
}

//增加内容
DataRow dr = tb.NewRow();
for (int r = 0; r < strRows.Length; r++)
{
try
{
dr[r] = strRows[r].Split('#')[1].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");
}
catch (Exception)
{

//Plugins_MessageBox.ByuMessageBox shoe = new Plugins_MessageBox.ByuMessageBox("tishi ",ex.ToString());

}

}
tb.Rows.Add(dr);
tb.AcceptChanges();
}
if (tb != null)
{
for (int i = 0; i < tb.Rows.Count; i++)
{
for (int n = 0; n < tb.Columns.Count; n++)
{
if (tb.Rows[i][n].ToString() == "null" || tb.Rows[i][n].ToString() == "")
{
tb.Rows[i][n] = null;
}
}
}
}
}
catch
{
return tb;
}
return tb;
}
#endregion