ASP.NET interview questions with answers :- How to add serial number column to Grid View?

This is one of the ASP.NET interview questions which has many answers. It doesn’t matter what you answer, interviewer always expects second answer. Actually he/she will be trying to see how in-depth you can think.

Solution 1 – Using TemplateField

<asp:Label ID=”LblSerialNo” runat=”server”  Text='<%#Container.DataItemIndex+1 %>’></asp:Label>

Solution 2 – Using SQL

Add one more column to your sql query, so that when you get the result set in fr Select *, Row_number() over(partition by UniqueKeyColumn order by UniqueKeyColumn) as Inedx from SoAndSoTable

Solution 3 – Using TableVairable in sql

Declare @MyTable Table
Index intidentity(1,1),
Column1 varchar(max),
Insert into @MyTable(Column1,Column2…)
Select Column1,Column2…. From SoAndSoTable

Solution 4 – Using Row Data Bound event of gridview

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
if (e.Row.RowType == DataControlRowType.DataRow)
Label lblSerial = (Label)e.Row.FindControl(“lblSerial”);
lblSerial.Text = ((GridView1.PageIndex * GridView1.PageSize) + e.Row.RowIndex + 1).ToString();

Solution 5 – Custom logic after you bind the grid

foreach(gridviewrow row in id of gridview.rows)
labellbl = (label)row.findcontrol(“lblserial”);
lbl.text= i;

No doubt First solution is best, but sometimes others also get handy. Below is a nice video which talks about What is the importance of sessions variables in ASP.NET


About c# and .NET Interview questions

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