Question

Is DataRow.NewRow() insufficient as the only row in a DataTable? I would expect this to work, but it doesn’t. It’s near the end of my Page_Load inside my If(!Postback) block. gridCPCP is GridView

DataTable dt = new DataTable();
dt.Columns.Add("ID", int.MinValue.GetType());
dt.Columns.Add("Code", string.Empty.GetType());
dt.Columns.Add("Date", DateTime.MinValue.GetType());
dt.Columns.Add("Date2", DateTime.MinValue.GetType());
dt.Columns.Add("Filename", string.Empty.GetType());

//code to add rows

if (dt.Rows.Count > 0)
{
    gridCPCP.DataSource = dt;
    gridCPCP.DataBind();
}
else
{
    dt.Rows.Add(dt.NewRow());
    gridCPCP.DataSource = dt;
    gridCPCP.DataBind(); //EXCEPTION
    int TotalColumns = gridCPCP.Rows[0].Cells.Count;
    gridCPCP.Rows[0].Cells.Clear();
    gridCPCP.Rows[0].Cells.Add(new TableCell());
    gridCPCP.Rows[0].Cells[0].ColumnSpan = TotalColumns;
    gridCPCP.Rows[0].Cells[0].Text = "No Record Found";   
}

The exception throws on gridCPCP.DataBind() and only when execution reaches the else block. If there were rows added above via dt.Rows.Add(new object[] { ... } binding works.

System.ArgumentOutOfRangeException: Length cannot be less than zero. Parameter name: length

Answer 1

Exception is because of the empty row. You should:

1. Make a new .NewRow()
2. Add desired fields
3. Add into the DataTable.

–

myRow = dt.NewRow();
myRow["ID"] = 1001;
myRow["Code"] = "YourCode";

dt.Rows.Add(myRow);
gridCPCP.DataSource = dt;
gridCPCP.DataBind();