Hi,
i have try to use multiple checkbox to delete users by using datagrid.

Below is my codes:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here

Dim conn As OleDbConnection
Dim objCmd = New OleDbCommand

conn = connectToDB()
objCmd.commandtext = "spGetMembers"
objCmd.CommandType = CommandType.StoredProcedure
objCmd.connection = conn

Dim myDataReader As OleDbDataReader
myDataReader = objCmd.ExecuteReader

dgDelMember.DataSource = myDataReader
dgDelMember.DataBind()
conn.close()
End Sub

Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click

Dim Item
For Each Item In Request.QueryString("chkMemDelete")
'SQL statement here

Dim conn As OleDbConnection
Dim objCmd = New OleDbCommand

conn = connectToDB()
objCmd.commandtext = "spDelMembers"
objCmd.CommandType = CommandType.StoredProcedure
objCmd.connection = conn

Dim myDataReader As OleDbDataReader
myDataReader = objCmd.ExecuteReader

dgDelMember.DataSource = myDataReader
dgDelMember.DataBind()
conn.Close()

Next

End Sub

But they can't find the "chkMemDelete" as the id for checkbox is in the datagrid.

Error:
Object reference not set to an instance of an object.