In my gridview i have 30000 records,while i export to excel, it export upto near 12000 records only,bellow my code to export to excel.
GridView1.AllowPaging = false;
DataTable dt = (DataTable)Session["tabledata"];
GridView1.DataSource = dt;
GridView1.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition", string.Format("attachment; filename={0}", "Customers.xls"));
Response.ContentType = "application/ms-excel";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
//Change the Header Row back to white color
GridView1.HeaderRow.Style.Add("background-color", "Red");
//Applying stlye to gridview header cells
for (int i = 0; i < GridView1.HeaderRow.Cells.Count; i++)
{
GridView1.HeaderRow.Cells[i].Style.Add("background-color", "Red");
}
GridView1.RenderControl(htw);
Response.Write(sw.ToString());
Response.End();
Here how can i export all(30k) gridview records to excel?
Here is a sample code to save your grid data to an excel file
protected void ExportToExcel(object sender, EventArgs e)
{
Response.Clear();
Response.Buffer = true;
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.xls");
Response.Charset = "";
Response.ContentType = "application/vnd.ms-excel";
using (StringWriter sw = new StringWriter())
{
HtmlTextWriter hw = new HtmlTextWriter(sw);
//To Export all pages
GridView1.AllowPaging = false;
this.BindGrid();
GridView1.HeaderRow.BackColor = Color.White;
foreach (TableCell cell in GridView1.HeaderRow.Cells)
{
cell.BackColor = GridView1.HeaderStyle.BackColor;
}
foreach (GridViewRow row in GridView1.Rows)
{
row.BackColor = Color.White;
foreach (TableCell cell in row.Cells)
{
if (row.RowIndex % 2 == 0)
{
cell.BackColor = GridView1.AlternatingRowStyle.BackColor;
}
else
{
cell.BackColor = GridView1.RowStyle.BackColor;
}
cell.CssClass = "textmode";
}
}
GridView1.RenderControl(hw);
//style to format numbers to string
string style = @"<style> .textmode { } </style>";
Response.Write(style);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
}
我建议您看一下OpenXmlWriter类,该类用于将大量数据导出到excel(这可以防止缓存问题)。
To export data to Excel, you can use the ClosedXML.Report library ( https://github.com/ClosedXML/ClosedXML.Report ). Believe me, this is a wonderful library and easy for her to use. The library does not need Excel Interop. ClosedXML.Report generates an Excel file based on a template that you can create in Excel using any formatting. For example:
var template = new XLTemplate(@".\Templates\report.xlsx");
using (var db = new DbDemos())
{
var cust = db.customers.LoadWith(c => c.Orders).First();
template.AddVariable(cust);
template.Generate();
}
template.SaveAs(outputFile);
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