Object reference not set to an instance of an object. when binding datatable to datagridview in c #

Question

I Want to save multiple value from window form to datatable and then i bind this table to Datagridview. Value are adding in Datatable but At:

dataGridViewX1.DataSource = dt.DefaultView.Table);

binding point error shows

Object reference not set to an instance of an object

How Can I solve it?

public AddOrder(string ItemName,int Qty,Double Price)
    {


        try
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("id");
            dt.Columns.Add("Item Name");

            dt.Columns.Add("Qty");
            dt.Columns.Add("Unit Price");
            dt.Columns.Add("Amounts");


            DataRow dr = dt.NewRow();
            dr["id"] = a;
            a++;

            dr["Item Name"] = ItemName;
            dr["Qty"] = Qty;
            dr["Unit Price"] = Price;
            dr["Amounts"] = (Convert.ToInt32(dr["Qty"]) * Convert.ToInt32(dr["Unit Price"]));
            dt.Rows.Add(dr);

            dataGridViewX1.DataSource = dt.DefaultView.Table;

        }
        catch(Exception ee)
        {
            DevComponents.DotNetBar.MessageBoxEx.Show(ee.Message,"Error Message");
        }
    }

Solution 1

The object reference exception could be occurring in an event handler related to data binding. For example, let's say your datagrid has something like this in the markup:

<asp:GridView ID="GridView1" OnRowDataBound="GridView1_RowDataBound"

When you call GridView1.DataBind(), the GridView1_RowDataBound method executes for each row during the data bind process. This method could contain some bad code to give you the "object reference..." exception.

Solution 2

is the initialization of the dataGridViewX1 in a InitializeComponent method?

    I Think it is parameterized constructor I it does not has initialization of controls

1) solution

   InitializeComponent(); need to call this method.

Its working my application

Comments

[Nitin Varpe]

have u tried dataGridViewX1.DataSource = dt;

[ziakhan]

Thanks for reply i this code (dataGridViewX1.DataSource = dt;) but still same problem

[ziakhan]

Thanks for reply i this code (dataGridViewX1.DataSource = dt;) but still same problem

[NoChance]

What problem? Please give specific error. Do you get an exception? What is the exception message?

[ziakhan]

exception message :Object reference not set to an instance of an object

[NoChance]

this is strange, try to see update in answer...Also, do a debug trace and see if dt is null or not before the bind.

[Shaharyar]

Update your question with the stack trace of exception

[ziakhan]

One record is exist in dt, but when i bind it ti datagridviewx1 then it cause the error Object reference not set to an instance of an object

[ziakhan]

Yes dear Method and datagridview are on the form

[ziakhan]

dt is not null it has one record

[NoChance]

This is very strange. I almost can't imagine that you get a bind error this way. Maybe you are not using standard datagridview component...