how can i count the total no of row in datagrid vb.net asdf

how can i count the total no of row in datagrid vb.net asdf

:((i m working on vb.net project it is runing nice if i run it on my machine. if i copy its exe in another machine it show problem in another machine . i m using mxflexgrid component of vb and excel refrence it show error in these parts and if i run it on both machine in same time then it show problem related to sql server database. please helpn me for sql server it show error-the maximum simultaneous user count of 1 license for this standard edition server has been exccedd. additonal licenses should be obtained and isstalled or u should upgrade to full version and for mshflexgrid and excel ref it show--- for assembly name axinterop mshflexgridlib or one of its dependencies was not found vivek

Private Sub txt_ord_qty_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txt_ord_qty.KeyPress If IsNumeric((e.KeyChar)) = False Then MsgBox("ENTER ONLY NUMERIC VALUE") End If End Sub I M USING THIS CODE BUT AFTER MESSAGE IT INSERT VALUE IN TEXTBOX HOW CAN I PREVENT STRING VALUE IN TEXTBOX PLEASE HELP ME asdf

HELLO FRIENDS HOW CAN I ADD REFRENCE OF EXCEL IN .NET PLEASE TELL ME STEP BY STEP asdf

how can i use mshflexgrid in vb.net i have add it from com lib but it is not working like visual basic asdf

i want insert values in datagrid via textbox i m not connected datagrid to database if anybody know this please help me vivek