make report from gridview to exel

friend if you want to make some report from gridview in Visual Studio using Visual Basic
don't forget to use

Imports System.IO

then type it into your link

Response.Clear()
Response.Buffer = True

Response.AddHeader("content-disposition", "attachment;filename=GridView1.xls")
Response.Charset = ""
Response.ContentType = "application/vnd.ms-excel"

Dim sw As New StringWriter()
Dim hw As New HtmlTextWriter(sw)

GridView1.AllowPaging = False
GridView1.DataBind()

'Change the Header Row back to white color
GridView1.HeaderRow.Style.Add("background-color", "#FFFFFF")
'Apply style to Individual Cells
GridView1.HeaderRow.Cells(0).Style.Add("background-color", "green")
GridView1.HeaderRow.Cells(1).Style.Add("background-color", "green")
GridView1.HeaderRow.Cells(2).Style.Add("background-color", "green"

For i As Integer = 0 To GridView1.Rows.Count - 1
Dim row As GridViewRow = GridView1.Rows(i)
'Change Color back to white
row.BackColor = System.Drawing.Color.White
'Apply text style to each Row
row.Attributes.Add("class", "textmode")
'Apply style to Individual Cells of Alternating Row
If i Mod 2 <> 0 Then
row.Cells(0).Style.Add("background-color", "#C2D69B")
row.Cells(1).Style.Add("background-color", "#C2D69B")
row.Cells(2).Style.Add("background-color", "#C2D69B")
End If
Next
GridView1.RenderControl(hw)

'style to format numbers to string
Dim style As String = ""
Response.Write(style)
Response.Output.Write(sw.ToString())
Response.Flush()
Response.End()

add this code to...

Public Overloads Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)
' Verifies that the control is rendered
End Sub

last set your EnableEventValidation="false"


let't try....