What is the difference between dataset and datatable?

0 Answers  

---

What is the difference between Data adaptor and Data set?

0 Answers   HCL,

---

What is ado.net in vb net?

0 Answers  

---

What is the provider and namespaces being used to access oracle database?

5 Answers   E2E, Microsoft,

---

Differences between dataset.clone and dataset.copy?

2 Answers   Ksb, TCS,

---

i making a project using windows application c#, i want to show user name, password, and one button login. i wanna make it with sealed class .how its possible . when i clicked my login button all project should be open. pls cleare me.

1 Answers  

---

Explain the basic use of "dataview" and explain its methods.

0 Answers  

---

Which parameter of ConnectionString is used to specify the name of the database?

0 Answers  

---

Define the executescalar method?

0 Answers  

---

What do you mean by performing asynchronous operation using command object?

0 Answers  

---

What is the difference between ado.net and entity framework?

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,

---