hello all,
i need urgent help here. My project is stuck up due to this.
Help appriciated.
ERROR MESSAGE:-
System.NullReferenceException: Object reference not set to an instance
of an object. at DSeditDB.WebForm1.Update_Command(Object sender,
DataGridCommandEventArgs e)
Error throw while using findbyid with dataset row.. it seems no row is
selected.
DATASET , SQLADAPTER , CONNECTION STRING MADE AT DESIGN TIME
DATASET : Datasetname:-DataSet1
Designname:- dataSet11
code:_
private void Page_Load(object sender, System.EventArgs e)
{
if (!IsPostBack)
{
BindData();
}
}
public void BindData()
{
sqlDataAdapter1.Fill(dataSet11);
DataGrid1.DataBind();
}
public void Edit_Command(object sender ,
DataGridCommandEventArgs e)
{
DataGrid1.EditItemIndex= e.Item.ItemIndex;
BindData();
}
public void Update_Command(object sender ,
DataGridCommandEventArgs e)
{
DataGrid1.EditItemIndex=(int) e.Item.ItemIndex;
TextBox tb;
string ID_copy = e.Item.Cells[4].Text;
int ID = System.Int32.Parse(ID_copy);
tb = (TextBox)e.Item.Cells[2].Controls[0];
int Age = System.Int32.Parse(tb.Text);
tb = (TextBox)e.Item.Cells[1].Controls[0];
string Name = tb.Text;
Name = Name.Trim();
tb = (TextBox)e.Item.Cells[3].Controls[0];
string Address = tb.Text;
Address = Address.Trim();
//DataSet1.table1Row RowChange =
dataSet11.table1.FindByID(3);
DataSet1.table1Row RowChange;
RowChange= null;
// Get the row to change using the primary key.
RowChange =dataSet11.table1.FindByID(ID);
// Change a field in the row.
try
{
RowChange.address="changed";
}
catch (Exception ex)
{
Label1.Text = ex.ToString();
}
DataGrid1.EditItemIndex= -1;
BindData();
}
public void Cancel_Command(object sender ,
DataGridCommandEventArgs e)
{
DataGrid1.EditItemIndex = -1;
BindData();
}
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