Please try with below code snippet.
Using UniqueName
protected void RadGrid1_PreRender(object sender, EventArgs e)
{
foreach (GridColumn column in RadGrid1.MasterTableView.Columns)
{
// If you used ClientSelectColumn then below code is not worked For that you have to put condition
//if(column.ColumnType == "GridBoundColumn")
int TotalNullRecords = (from item in RadGrid1.MasterTableView.Items.Cast<GridDataItem>()
where string.IsNullOrWhiteSpace(item[column.UniqueName].Text) ||
item[column.UniqueName].Text == " "
select item).ToList().Count;
if (TotalNullRecords == RadGrid1.MasterTableView.Items.Count)
{
RadGrid1.MasterTableView.Columns.FindByUniqueName(column.UniqueName).Visible = false;
}
}
}
By Using Index
protected void RadGrid1_PreRender(object sender, EventArgs e)
{
foreach (GridColumn column in RadGrid1.MasterTableView.Columns)
{
// If you used ClientSelectColumn then below code is not worked For that you have to put condition
//if(column.ColumnType == "GridBoundColumn")
int TotalNullRecords = (from item in RadGrid1.MasterTableView.Items.Cast<GridDataItem>()
where string.IsNullOrWhiteSpace(item[column.UniqueName].Text) ||
item[column.UniqueName].Text == " "
select item).ToList().Count;
if (TotalNullRecords == RadGrid1.MasterTableView.Items.Count)
{
column.Visible = false;
}
}
}