Hello Mohammad,
The Count Aggregate will give you that information. You can see more about in the following resources:
Here's also a very simple example I created for you:
and some dummy data to get it running:
protected DataTable GetDummyData()
{
DataTable tbl = new DataTable();
tbl.Columns.Add(new DataColumn("Id", typeof(decimal)));
tbl.Columns.Add(new DataColumn("textField", typeof(string)));
tbl.Columns.Add(new DataColumn("valueField", typeof(int)));
tbl.Columns.Add(new DataColumn("fourthField", typeof(string)));
tbl.Rows.Add(new object[] { 1, "one", 1, "red" });
tbl.Rows.Add(new object[] { 1, "two", 2, "green" });
tbl.Rows.Add(new object[] { 5, "three", 3, "blue" });
tbl.Rows.Add(new object[] { 6, "four", 1, "pink" });
return tbl;
}
protected void rg1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
(sender as RadGrid).DataSource = GetDummyData();
}
Regards,
Marin Bratanov
Progress Telerik
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