Question

I have multiple datatable. I want to show all the datatable rows into a single gridview.
How can I do that?

DataTable dtbag101 = (DataTable)Session["bag101"];
DataTable dtwallet111 = (DataTable)Session["wallet111"];


DataSet ds= new DataSet();
ds.Tables.Add(dtbag101);
ds.Tables.Add(dtwallet111);

GridView1.DataSource= ds;
GridView1.DataBind();

The column names for both datatable are the same.
Here I was trying to use dataset but only first DataTable i.e. datbag101 was showing in the gridview.

How can I show all the values in one gridview?

Answer 1

You may need to use DataTable.Merge

DataTable dtAll = new DataTable();
dtAll = dtbag101 .Copy();
dtAll.Merge(dtwallet111, true);
GridView1.DataSource= dtAll;
GridView1.DataBind();

Edit to show how it should work

private void BindGridWithMergeTables()
{
    DataTable dt1 = new DataTable();
    DataTable dt2 = new DataTable();

    dt1.Columns.Add("ID");
    dt2.Columns.Add("ID");

    DataRow dr1 = dt1.NewRow();
    DataRow dr2 = dt2.NewRow();

    dr1["ID"] = "1";
    dr2["ID"] = "2";
    dt1.Rows.Add(dr1);
    dt2.Rows.Add(dr2);

    DataTable dtAll = new DataTable();
    dtAll = dt1.Copy();
    dtAll.Merge(dt2, true);
    dataGridView1.DataSource = dtAll;
    dataGridView1.DataBind();

}