将数据插入数据库后，文本框自动刷新

Question

i have a textbox in C# and a insertbutton , i have allready show Max+1 in textbox from my databse column ItemId

 OleDbDataAdapter _adapter = new OleDbDataAdapter("SELECT MAX(ItemId)+1 FROM TableItem", con); DataTable _datatable = new DataTable(); _adapter.Fill(_datatable); textBoxInsert.Text = _datatable.Rows[0][0].ToString(); 

now textbox show successfully may data but when i have going to insert to data insert successfully and refresh grid and can not auto refresh text box which i have show max+1 i have following insertion command

>  OleDbDataAdapter adp3 = new OleDbDataAdapter("INSERT INTO
> TableItem(ITEMID,ITEMNAME,UNITID,CATEGORYID,ITEMSTATUS,SUPPLIERID)VALUES('"+textBoxInsert.Text+"','"+textBoxItem.Text+"','"+comboBoxUnitId.Text+"','"+comboBoxCategory.Text+"','"+textBoxStatus.Text+"','"+comboBoxSupplier.Text+"')",
> con);
>            adp3.SelectCommand.ExecuteNonQuery();
>            
>            autorelode();//Call Autoload Method
>          
>              OleDbDataAdapter _adapter = new OleDbDataAdapter("SELECT MAX(ItemId)+1  FROM TableItem", con);
>             DataTable _datatable = new DataTable();
>             _adapter.Fill(_datatable);
>             textBoxInsert.Text = _datatable.Rows[0][0].ToString();

but can not auto refresh my data in textbox.

Answer 1

you can create method then call the method in insert button

 private void auto() { OleDbDataAdapter adp= new OleDbDataAdapter("SELECT MAX(ChallanNo)+1 FROM TablePurchase", con); DataTable dt = new DataTable(); adp.Fill(dt); ChallanNo.Text = dt.Rows[0][0].ToString(); con.Close(); }