change the value of a row in an datatable in an foreach loop

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Hi every one im trying to change the value of a row in an datatable in an foreach loop

C#

protected void btnFixZero(object sender, EventArgs e)
{
    System.Data.DataTable dt = new System.Data.DataTable();
    dt = (System.Data.DataTable)ViewState["SelectedRecords"];
    int rowscount = GridView2.Rows.Count;
    int columnscount = GridView2.Columns.Count;
    if (missingCell == 0)
    {
        foreach (DataRow row in dt.Rows)
        {

            string cellData = row["F4"].ToString(); //original value
            string sub0 = cellData.Substring(0, 1);
            string sub1 = cellData.Substring(1, 1);
            string subplus = cellData.Substring(0, 1);

            if (sub0 == "2" && sub1 == "7")
            {
                cellData = cellData.Remove(0, 2);
                cellData = "0" + cellData;//change original value save it   back to the datatable
                row.AcceptChanges();
                dt.AcceptChanges();
            }
            if (sub0 != "0")
            {
                cellData = "0" + cellData;//change original value save it   back to the datatable
                row.AcceptChanges();
                dt.AcceptChanges();
            }

        }
        ViewState["SelectedRecords"] = dt;


        GridView2.DataSource = dt;
        GridView2.DataBind();
    }

       }

Posted 8-Jan-13 23:15pm

mrDivan

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[no name] 9-Jan-13 5:19am

what's the problem now...

mrDivan 9-Jan-13 5:28am

hallo thank you for your response the problem is that it does not save the updated value back to dt//the datatable

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mrDivan · Accepted Answer · 2013-01-08T23:52:00

C#

protected void btnFixZero(object sender, EventArgs e)
      {
          System.Data.DataTable dt = new System.Data.DataTable();
          dt = (System.Data.DataTable)ViewState["SelectedRecords"];
          int rowscount = GridView2.Rows.Count;
          int columnscount = GridView2.Columns.Count;
          if (missingCell == 0)
          {
              foreach (DataRow row in dt.Rows)
              {

                  string cellData = row["F4"].ToString();
                  string sub0 = cellData.Substring(0, 1);
                  string sub1 = cellData.Substring(1, 1);
                  string subplus = cellData.Substring(0, 1);

                  if (sub0 == "2" && sub1 == "7")
                  {
                      cellData = cellData.Remove(0, 2);
                      cellData = "0" + cellData;
                      row["F4"] = cellData;//had to specify which column
                      row.AcceptChanges();
                      dt.AcceptChanges();
                  }
                  if (sub0 != "0")
                  {
                      cellData = "0" + cellData;
                      row["F4"] = cellData;//had to specify which column
                      row.AcceptChanges();
                      dt.AcceptChanges();
                  }

              }
              dt.AcceptChanges();
              ViewState["SelectedRecords"] = dt;


              GridView2.DataSource = dt;
              GridView2.DataBind();
          }

             }