What is difference between datatable and dataset?

0 Answers  

---

About ADO and its objects ?

1 Answers   DELL,

---

What is the difference between a Dataset and DataReader? Can dataReader hold data from multiple tables?

3 Answers   Fulcrum Logic, Merrill Lynch,

---

What provider ADO.net use by default?

10 Answers   Accenture, TCS,

---

Sequence to connect and retrieve data from database useig dataset ?

6 Answers   MMTS,

---

How to fetch the last inserted record in a particular table?

10 Answers   CarrizalSoft Technologies, Microsoft,

---

What is the default provider in ado.net?

0 Answers  

---

What two types of data providers does ADO.NET supply? What determines which one you should use?

0 Answers   CDC,

---

Give few examples of datareader that is used in different dataproviders.

0 Answers  

---

What is serialization and de-serialization in .net?

0 Answers  

---

Explain the difference between sqlcommand object and command behavior object?

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,

---