ADO.NET Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

ADO.NET Interview Questions

Questions Answers Views Company eMail

what is data access layer?

Honeywell,

2 8647

What is the default view of Data Grid?

TCS,

5 15045

what is Sql Native Client?

Gantec Solutions,

5 18939

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();

Mind Tree, TCS,

2 16289

what is the syntax code for oldb to connect oracle?

2 5214

what is execute scalar?

Atharva Infotech, Dohatec New Media, Make eIT, Protech,

11 25085

what is Execute NOn Query?

Infosys, Protech, Sars Systems, SwanSoft Technologies,

29 69571

what is the syntax code for oldb to connect oracle

IBM,

3 6602

what is the syntax code to oledb to connect oracle

IBM,

6 12001

When we are running the Application, if any errors occur in the Stored Procedure then how will the server identify the errors?

HCL,

5 11821

how do u connect ado.net to sql server

Microsystems,

1 6006

how to keep track of index in listbox items.

2 5832

How do we invoke queries from the application

2 4711

Why sql Data Reader object not created

Matrix,

9 22423

what is the criteria of selection in sbi interview?

BCS, State Bank Of India SBI,

1 4951

Post New ADO.NET Questions

Un-Answered Questions { ADO.NET }

Which is faster datareader or dataadapter?

1048

Which is better ole db or odbc?

960

How to identify the updated rows in a dataset?

1064

What is bubbled event?

1022

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

1013

What is ado rdo dao in visual basic?

1209

Command objects uses, purposes and their methods.

1032

What is the difference between data grid and data repeater?

1143

How to creating a SqlCommand Object?

1200

What is connection in ado.net?

1002

What is aggregating data ?

1027

What is an ado?

1031

What is sql command in ado net?

1014

How we can provide data to ado.net?

1131

How can we serialize the dataset object?

1057

For More Un-Answered { ADO.NET } Questions Click Here