Which is the best institute in hyderabad to learn DotNet?

11 Answers   Cognizant,

---

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,

---

About ado.net components/objects. Usage of data adapters and tell the steps to retrieve data ?

1 Answers   MMTS,

---

How does entity framework work?

0 Answers  

---

What is a datareader object?

0 Answers  

---

---

What is execute scalar in ado.net?

0 Answers  

---

How can we load multiple tables in a dataset?

0 Answers  

---

What are the Different layers in ADO.Net?

10 Answers   eXensys,

---

Can you edit data in the Repeater control?

9 Answers  

---

What are the steps in connecting to database?

3 Answers   IBM, Microsoft,

---

Which method do you invoke on the DataAdapter control to load your generated dataset with data?

5 Answers   IBM, Veegyapan Impacts,

---

What is ado and rdo?

0 Answers  

---