WPF and C#: Problem: 1. How to Refresh Radgridview when i Insert,update and Delete Record in database anrecord. 2.when i am Insert or Update Record than in radgridview that row is selected.

i am useing sql server 2005.

i am use to set data source of radgridview like " radgridview1.ItemsSource = ds; " ==> ds is dataset.

i am beginner so if possible than tel me by code it is easy to understand.......

can u help me as early as possible ....

i give some code which i am useing for update RadGridview

con.ConnectionString = @"Data Source=(local);Initial Catalog=DigiDms;Integrated Security=True";

        cmd1.Connection = con;
        con.Open();
        cmd1.CommandType = CommandType.StoredProcedure;
        cmd1.CommandText = "Pro_Insurance_Master_Select";
        da1.SelectCommand = cmd1;
        da1.Fill(ds1);
        con.Close();

        //dataGrid.clear();
        //dsGrid.Reset();
        //dsGrid = dataGrid.GetData("Pro_Insurance_Master_Select"); //set datasource of gridview

        gridShowData.ItemsSource = null;
        gridShowData.ItemsSource = ds1;

doing this ,

when i am delete or update record than folloning error generated... Error: >> "Object reference not set to an object"
when i am doing the "gridShowData.ItemsSource = null;"

and when i am doing insert operation than this error is not generated and RadGridview also updated.....

so pls help me as early as possible.... i am beginer ........

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