Question

Hey guys I’ve just started programming and I’m running into a problem. The new Datatable i created doesnt show in GridView2 when button1 is clicked. Although it is filled with data from the “planning” table(checked that dtPlanning is filled with the TextBoxes in comment).

So in short: I want to get DataTable planning into the new DataTable dtPlanning and display it in a gridview.

Code Behind:

protected void Button1_Click(object sender, EventArgs e)
{
    DataTable dtPlanning = new DataTable();
    dtPlanning.Columns.Add("Courseday", typeof(int));
    dtPlanning.Columns.Add("Part", typeof(string));
    dtPlanning.Columns.Add("Design", typeof(string));
    dtPlanning.Columns.Add("Lesson", typeof(string));

    //DataRow dr = planning.Rows[1];  
    //TextBox2.Text = (dr["Daynumber"]).ToString();
    //TextBox3.Text = (dr["Part"]).ToString();
    //TextBox4.Text = (dr["Design"]).ToString();
    //TextBox5.Text = (dr["Lesson"]).ToString();

    for (int i = 0; i < dtPlanning.Rows.Count; i++)
    {
        DataRow dr = dtPlanning.NewRow();
        foreach (DataRow datarow in planning.Rows)
        {
            dtPlanning.Rows.Add(datarow);
        }
    }
    GridView2.DataSource = dtPlanning;
    GridView2.DataBind();
}

Source code:

<asp:GridView ID="GridView2" runat="server">

Thank you for your help.

Answer 1

Logically, dtPlanning.Rows.Count = 0 because this table is just initialized!
Secondly, you cannot Add a row from one table to another, user Import

for (int i = 0; i < planning.Rows.Count; i++)
{
    dtPlanning.ImportRow(planning.Rows[i]);
}

I wonder why don’t you just use the table planning?