Delete multiple row with radgrid - telerik

Question

I am using Radgrid view with multi select row
I want to delete all selected records using checkbox in RadGrid
Code:
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"
OnNeedDataSource="RadGrid1_NeedDataSource"
AllowMultiRowSelection="true">
<MasterTableView DataKeyNames="ID">
<Columns>
<telerik:GridClientSelectColumn>
</telerik:GridClientSelectColumn>
<telerik:GridBoundColumn DataField="Name" UniqueName="Name" HeaderText="Name">
</telerik:GridBoundColumn>
<telerik:GridEditCommandColumn>
</telerik:GridEditCommandColumn>
</Columns>
</MasterTableView>
<ClientSettings>
<Selecting AllowRowSelect="true" />
</ClientSettings>
</telerik:RadGrid>
.aspx.vb
Protected Sub Button1_Click(sender As Object, e As EventArgs)
For Each item As GridDataItem In RadGrid1.SelectedItems
If item.Selected Then
'Access data key
Dim strID As String = item.GetDataKeyValue("ID").ToString()
End If
NEXT
End Sub
The problem is when I use this method to get selected rows IDs to delete records, it is retrieving only one record ID and deleting the record for which the ID is retrieved.
Example: I am selecting records 1,2,3,4 and clicking the delete button, it is deleting only the record with ID=4

Answer 1

I don't know vs Basic very well. But I can say that,
you are loose your current ID knowledge in this command
Dim strID As String = item.GetDataKeyValue("ID").ToString()
every iteration in foreach, your strId variable update with new item id.
Maybe you can use concat string methods (maybe
strId += item.id
to save your all selected ids.

Answer 2

Try below code:
protected void Button1_Click(object sender, EventArgs e)
{
string strID = string.Empty;
foreach( GridDataItem grditem in RadGrid.SelectedItems)
{
if (grditem.Selected)
{
strID = strID + "," + grditem.GetDataKeyValue("ID").ToString();
}
}
if (strID != string.Empty)
{
//your delete logic for db
// pass strID it will contain 1,2,3,4
}
}