How xml files and be read and write using dataset ?

1 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,

---

differance between ADO vs ADO.Net?

0 Answers   MCN Solutions,

---

What is commandbuilder in ado.net?

0 Answers  

---

How can we serialize the dataset object?

0 Answers  

---

Whate are different types of Commands available with DataAdapter ?

2 Answers  

---

What is a dataset?

3 Answers  

---

What are all the different authentication techniques used to connect to MS SQL Server?

0 Answers  

---

What is a datagrid?

4 Answers  

---

What is an ado connection?

0 Answers  

---

What are the classes in System.Data.Common Namespace?

0 Answers  

---

What are the benefits of using of ADO.NET in .NET 4.0?

0 Answers  

---