C# 将GridView导出到Excel时出错
将网格视图导出到Excel时,出现以下消息错误 我的数据库是SQL Server,我的表有8000行 当我只选择一行进行gridview时,它会无错误地导出到excel 但当我选择所有行时,就会出现这个问题 这是我的密码C# 将GridView导出到Excel时出错,c#,asp.net,excel,gridview,C#,Asp.net,Excel,Gridview,将网格视图导出到Excel时,出现以下消息错误 我的数据库是SQL Server,我的表有8000行 当我只选择一行进行gridview时,它会无错误地导出到excel 但当我选择所有行时,就会出现这个问题 这是我的密码 protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { System.Data.SqlClient.SqlDataReader reader = objCale
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
System.Data.SqlClient.SqlDataReader reader = objCalep.SelectAll(true, false, "[تاريخ الاستشهاد]");
// System.Data.SqlClient.SqlDataReader reader = objCCP.CPSelectNo(2700);
DataTable dataTable = new DataTable();
dataTable.Load(reader);
GridView1.DataSource = dataTable;
GridView1.DataBind();
}
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//System.Data.Common.DbDataRecord drv = e.Row.DataItem as System.Data.Common.DbDataRecord;
DataRowView dataRowView = e.Row.DataItem as DataRowView;
DataRow drv = dataRowView.Row;
Object ob = drv["تاريخ الاستشهاد"];
if (!Convert.IsDBNull(ob))
{
DateTime dateTime = (DateTime)ob;
e.Row.Cells[4].Text = dateTime.ToString("dd/MM/yyyy");
e.Row.Cells[4].Width = 100;
}
}
}
protected void btn_Add_Click(object sender, ImageClickEventArgs e)
{
PrepareGridViewForExport(GridView1);
ExportGridView();
}
private void ExportGridView()
{
string attachment = "attachment; filename=حلب.xls";
Response.ClearContent();
Response.AddHeader("content-disposition", attachment);
Response.ContentType = "application/ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
GridView1.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
}
public override void VerifyRenderingInServerForm(Control control)
{
}
private void PrepareGridViewForExport(Control gv)
{
LinkButton lb = new LinkButton();
Literal l = new Literal();
string name = String.Empty;
for (int i = 0; i < gv.Controls.Count; i++)
{
if (gv.Controls[i].GetType() == typeof(LinkButton))
{
l.Text = (gv.Controls[i] as LinkButton).Text;
gv.Controls.Remove(gv.Controls[i]);
gv.Controls.AddAt(i, l);
}
else if (gv.Controls[i].GetType() == typeof(DropDownList))
{
l.Text = (gv.Controls[i] as DropDownList).SelectedItem.Text;
gv.Controls.Remove(gv.Controls[i]);
gv.Controls.AddAt(i, l);
}
else if (gv.Controls[i].GetType() == typeof(CheckBox))
{
l.Text = (gv.Controls[i] as CheckBox).Checked ? "True" : "False";
gv.Controls.Remove(gv.Controls[i]);
gv.Controls.AddAt(i, l);
}
if (gv.Controls[i].HasControls())
{
PrepareGridViewForExport(gv.Controls[i]);
}
}
}
受保护的无效页面加载(对象发送方,事件参数e)
{
如果(!IsPostBack)
{
System.Data.SqlClient.SqlDataReader reader=objCalep.SelectAll(true、false、“[1578]、[1575]、[1575]、[1588]、[1575];
//System.Data.SqlClient.SqlDataReader=objCCP.CPSelectNo(2700);
DataTable=新的DataTable();
加载(读卡器);
GridView1.DataSource=dataTable;
GridView1.DataBind();
}
}
受保护的void GridView1_RowDataBound(对象发送方,GridViewRowEventArgs e)
{
如果(e.Row.RowType==DataControlRowType.DataRow)
{
//System.Data.Common.DbDataRecord drv=e.Row.DataItem作为System.Data.Common.DbDataRecord;
DataRowView DataRowView=e.Row.DataItem作为DataRowView;
DataRow drv=dataRowView.Row;
对象ob=drv[数字参考值];
如果(!Convert.IsDBNull(ob))
{
DateTime DateTime=(DateTime)ob;
e、 Row.Cells[4]。Text=dateTime.ToString(“dd/MM/yyyy”);
e、 行。单元格[4]。宽度=100;
}
}
}
受保护的无效btn\u添加\u单击(对象发送者,ImageClickEventArgs e)
{
准备GridViewForExport(GridView1);
ExportGridView();
}
私有void ExportGridView()
{
string attachment=“附件;文件名=حلب.xls”;
Response.ClearContent();
AddHeader(“内容处置”,附件);
Response.ContentType=“应用程序/ms excel”;
StringWriter sw=新的StringWriter();
HtmlTextWriter htw=新的HtmlTextWriter(sw);
GridView1.渲染控制(htw);
Response.Write(sw.ToString());
Response.End();
}
公共覆盖无效VerifyRenderingInServerForm(控件)
{
}
私有void PrepareGridViewForExport(控制gv)
{
LinkButton lb=新的LinkButton();
文字l=新文字();
string name=string.Empty;
对于(int i=0;i
这是图像错误,我看不出多少错误信息,但我猜网格的ViewState数据大于站点上配置的最大请求长度(我认为默认值为4MB) 尝试更改web.config的
部分中的
如果这样做有效,您可以将maxRequestLength保留在足够高的值,或者禁用网格的ViewState,尽管在回发后必须再次从数据库检索数据