DataGrid实现自定义分页，鼠标移至变色，删除确认、可编辑，可删除

数据库：SqlServer 2000, 数据源：系统自带的Northwind

操作系统：Window XP 中文版

开发平台：.Net Framework 1.1, C#语言

效果预览：好了，让我们开始奇异的Datagrid之旅吧：

先在数据库中定义存储过程，轻易实现百万级数据分页：

//@PageSize：分页大小，PageIndex：页号，@PageCount：总页数，@recordCount：记录数

CREATE PROCEDURE GetCustomDataPage @pageSize int, @pageIndex int, @pageCount int output, @recordCount int output AS

declare @SQL varchar(1000)

select @recordCount=count(*) from products

set @pageCount=ceiling(@recordCount*1.0/@pageSize)

if @pageIndex = 0 or @pageCount<=1

set @SQL='select top '+str(@pageSize)+' productID,productName, unitPrice from products order by productID asc'

else if @pageIndex = @pageCount -1

set @SQL='select * from ( select top '+str(@recordCount - @pageSize * @pageIndex)+' productID,productName, unitPrice from products order by productID desc) TempTable order by productID asc'

elseset @SQL='select top '+str(@pageSize) +' * from ( select top '+str(@recordCount - @pageSize * @pageIndex)+' productID,productName, unitPrice from products order by productID desc) TempTable order by productID asc' exec(@SQL)

GO

好了，存储过程建好了，那么如何在.Net中使用呢？请看以下代码：

private uint pageCount;//总页数 private uint recordCount;//总记录数

private DataSet GetPageData(uint pageSize, uint pageIndex) { string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]; SqlConnection conn = new SqlConnection(strConn); conn.Open(); SqlCommand command = new SqlCommand("GetCustomDataPage",conn);//第一个参数为存储过程名 command.CommandType = CommandType.StoredProcedure; //声明命令类型为存储过程 command.Parameters.Add("@pageSize",SqlDbType.Int); command.Parameters["@pageSize"].Value = pageSize; command.Parameters.Add("@pageIndex",SqlDbType.Int); command.Parameters["@pageIndex"].Value = pageIndex; command.Parameters.Add("@pageCount",SqlDbType.Int); command.Parameters["@pageCount"].Value = pageCount; command.Parameters["@pageCount"].Direction = ParameterDirection.Output;//存储过程中的输出参数 command.Parameters.Add("@recordCount",SqlDbType.Int); command.Parameters["@recordCount"].Value = recordCount; command.Parameters["@recordCount"].Direction = ParameterDirection.Output; //存储过程中的输出参数 SqlDataAdapter adapter = new SqlDataAdapter(command); DataSet ds = new DataSet(); adapter.Fill(ds); //获得输出参数值 pageCount = Convert.ToUInt32(command.Parameters["@pageCount"].Value); recordCount = Convert.ToUInt32(command.Parameters["@recordCount"].Value); conn.Close(); return ds; } //绑定数据到DataGrid中 private void BindDataGrid() { DataSet ds = GetPageData((uint)dgProduct.PageSize,(uint)dgProduct.CurrentPageIndex); dgProduct.VirtualItemCount = (int)recordCount; dgProduct.DataSource = ds; dgProduct.DataBind(); } //页面加载时就绑定DataGrid private void Page_Load(object sender, System.EventArgs e) { if(!Page.IsPostBack) { BindDataGrid(); } } //用户翻页时事件处理 private void dgProduct_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e) { dgProduct.CurrentPageIndex = e.NewPageIndex; BindDataGrid(); } //用户单击编辑按纽时事件处理 private void dgProduct_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) { dgProduct.EditItemIndex = e.Item.ItemIndex; BindDataGrid(); } //用户单击取消按纽时事件处理 private void dgProduct_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) { dgProduct.EditItemIndex = -1; BindDataGrid(); } //用户单击更新按纽时事件处理 private void dgProduct_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) { string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]; SqlConnection conn = new SqlConnection(strConn); conn.Open(); //string strSQL = "update from products set productName=@productName, set unitPrice=@unitPrice where productID=@productID"; string strSQL = "update products set productName=@productName where productID=@productID"; SqlCommand command = new SqlCommand(strSQL,conn); command.Parameters.Add("@productName",SqlDbType.NVarChar,40); command.Parameters["@productName"].Value = ((TextBox)(e.Item.Cells[1].Controls[0])).Text.Trim(); //command.Parameters.Add("@unitPrice",SqlDbType.Int); //command.Parameters["@unitPrice"].Value = Convert.ToInt32(((TextBox)(e.Item.Cells[2].Controls[0])).Text.Trim()); command.Parameters.Add("@productID",SqlDbType.Int); command.Parameters["@productID"].Value = dgProduct.DataKeys[e.Item.ItemIndex]; command.ExecuteNonQuery(); conn.Close(); dgProduct.EditItemIndex = -1; BindDataGrid(); } //用户单击删除按纽时事件处理 private void dgProduct_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e) { string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]; SqlConnection conn = new SqlConnection(strConn); conn.Open(); SqlCommand command = new SqlCommand("DeleteProduct",conn); command.CommandType = CommandType.StoredProcedure; command.Parameters.Add("@productID",SqlDbType.Int); command.Parameters["@productID"].Value = dgProduct.DataKeys[e.Item.ItemIndex]; command.ExecuteNonQuery(); BindDataGrid(); } //实现删除确认及颜色交替显示功能 private void dgProduct_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) { if(e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem) { Button btnDelete = (Button)(e.Item.Cells[4].Controls[0]); btnDelete.Attributes.Add("onClick","JavaScript:return confirm('确定删除？')"); e.Item.Attributes.Add("onMouseOver","this.style.backgroundColor='#FFCC66'"); e.Item.Attributes.Add("onMouseOut","this.style.backgroundColor='#ffffff'"); } }