How can you implement sub data grid in a master datagrid?

1 Answers  

---

How can we add relation between tables in a dataset?

0 Answers  

---

Which is faster datareader or dataadapter?

0 Answers  

---

What are dataproviders?

0 Answers  

---

can we change the data in dataset? if yes what is the process?

1 Answers   Artech,

---

What?s the role of the DataReader class in ADO.NET connections?

7 Answers   Honeywell, Ksb,

---

Explain the DataAdapter.Update() and DataSetAcceptChanges() methods.

0 Answers  

---

What is the default provider in ado.net?

0 Answers  

---

Describe briefly an ADO.NET Dataset ?

0 Answers   Siebel,

---

How to work with disconnected data - the dataset and sqldataadapter?

0 Answers  

---

What are the major difference between classic ADO and ADO.NET?

0 Answers  

---

How To Update A Column In A DataGrid Using C#.NET? I am getting InvalidCastException as (Specified cast is not valid) while updating 2nd column in a datagrid? Id,firstname,lastname are the three columns of my datagrid respectively. I wanted to edit the second column(lastname) and update it. I did the following code in DataGrid's updatecommand(),but failed to update ! Int varid=(int)DataGrid1.DataKeys[e.Item.ItemIndex]; TextBox lnm=(TextBox)e.Item.Cells[2].Controls[0]; string str=lnm.Text ; SqlCommand cmd=new SqlCommand("update customer set lastname='" + str + "' where id=" + varid + "",con); cmd.ExecuteNonQuery(); DataGrid1.EditItemIndex=- 1; DataGrid1.DataBind();

2 Answers   Mind Tree, TCS,

---