Loop through all the rows of a GridView

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One simple way to loop through all the rows in all the pages of a GridView is to access its DataSource. In this example, we will loop through the SQLDataSource to retrieve all the rows in a GridView and access its cell value. You can modify the logic depending on the type of controls you have added to the GridView

C#

protected void btnLoop_Click(object sender, EventArgs e)
{
    DataSourceSelectArguments dsaArgs = new DataSourceSelectArguments();
    DataView view = (DataView)SqlDataSource1.Select(dsaArgs);
    DataTable dt = view.ToTable();
    for (int i = 0; i < dt.Rows.Count; i++)
    {
        for (int j = 0; j < dt.Columns.Count; j++)
        {
            string s = dt.Rows[i][j].ToString();
        }
    }
}

VB.NET

Protected Sub btnLoop_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim dsaArgs As New DataSourceSelectArguments()
    Dim view As DataView = CType(SqlDataSource1.Select(dsaArgs), DataView)
    Dim dt As DataTable = view.ToTable()
    For i As Integer = 0 To dt.Rows.Count - 1
        For j As Integer = 0 To dt.Columns.Count - 1
            Dim s As String = dt.Rows(i)(j).ToString()
        Next j
    Next i
End Sub

Note: If you loop through the GridView instead of the DataSource, you will loop through the rows only for 'that current page'

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About The Author

Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.