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TCS ADO.NET Interview Questions
Questions Answers Views Company eMail

Advantage of ADO.Net?

2 9217

How would u connect to database using .NET?

5 6870

Difference between DataReader and DataAdapter / DataSet and DataAdapter?

3 29798

What are the differences between RAW, AUTO and Explicit modes in retrieving data from SQL Server in XML format?

1 18107

Differences between dataset.clone and dataset.copy?

2 5788

What are the two fundamental objects in ADO.NET?

8 18854

how can implement dropdownlist in particular of dataset when try to update?


Call a stored procedure from and pass parameter to it ?

7 20059

Where does ADO.NET and XML web services come in the architecture ?

1 10041

What does ADO.NET consists of ?

7 9957

What is the key feature of ADO.NET compared to ADO ?

3 6231

What is ODP.NET ?

1 7610

What provider use by default?

10 17905

What is the default view of Data Grid?

5 10831

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 13844

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