ASP.NET GridView Tutorial - Implement paging in an gridview that uses sqldatasource – Part 50

Database, Information Technology

ASP.NET GridView Tutorial

301 Lessons

Implement paging in an gridview that uses sqldatasource – Part 50

Link for csharp,,, dotnet basics and sql server video tutorial playlists

Link for text version of this video

In this video we will discuss about implementing paging in a gridview control that use sqldatasource control.

Step 1: Drag and drop a gridview, a label and a sqldatasource control on webform1.aspx

Step 2: Configure SqlDataSource1 control to retrieve data from tblEmployee table.

Step 3: Associate GridView1, with SqlDataSource1 control and make sure to select “Enable Paging” checkbox.

Step 4: To control the number of rows displayed in the gridview, set PageSize property. Since, I want to display 3 rows on a page, I have set the PageSize to 3.

Step 5: Generate GridView1 control’s PreRender eventhandler method. Copy and paste the following code in code-behind file.
protected void GridView1_PreRender(object sender, EventArgs e)
Label1.Text = “Displaying Page ” + (GridView1.PageIndex + 1).ToString()
+ ” of ” + GridView1.PageCount.ToString();

That’s it we are done. Run the application. Since we have 6 records in the database table, and as we have set the pagesize to 3, the GridView1 control shows 2 pages with 3 records on each page.

Points to remember:
1. To control the number of rows displayed per page use PageSize property of GridView control.
2. When paging is enabled AllowPaging attribute of gridview control is set to True
3. PageIndex property of gridview control can be used to retrieve the page that is currently being viewed. PageIndex is ZERO based, so add 1 to it, to compute the correct page number that is being displayed in the gridview.
4. To get the total number of pages available, use PageCount property of GridView control.
5. When sqldatasource control is used, we get default paging. This means that, though we are displaying only 3 records on a page all the rows will be retrieved from the database and the gridview control then displays the correct set of 3 records depending on the page you are viewing. Everytime you click on a page, all the rows will be retrieved. Obviously this is bad for performance. We will discuss about custom paging in a later video session, which solves this problem. With custom paging it is possible to retrieve only the required number of rows and not all of them.

    Access DataSource in AccessDataSource in Alert another gridview ascending asp net gridview access database c# bind xml to gridview data source controls datagridview datasource controls get data from access database gridview gridview bind to xml gridview edit gridview formatting gridview sqldatasource gridview xml c# gridview xml file ms access database example objectdatasource explained between bi-directional bidirectional bind xml file to gridview in binding xml file to gridview business objects C# c# accessdatasource c# data source object c# datagrid example c# get data from access database c# gridview sqldatasource c# sql data source connection string c# sqldatasource example c# sqldatasource selectcommand c# xslt example c# xslt transform xml document c# xslt tutorial cells changing data checkbox client-side code colspan CompareAllValues compute concurrency confirm ConflictDetection conflictdetection property content control controls convert xml node to attribute custom paging Data DataFormat String DataFormatString datagrid in datagrid in c# DataKeyNames dataset datasource datasource controls default paging delete delete confirmation delete data Deleting deleting data descending detailed data details view details view in DetailsView difference display Displaying displaying gridview document Drill Down Drilldown drilling down dropdownlist edit edit and update editing EmptyDataTemplate EmptyDataText event example Excel Export exporting footer footer row format formatting gridview at runtime Formatting gridview in code generate Grid View gridview gridview currency format gridview datasource xml file gridview date format gridview ms access database gridview retrieve templatefield value gridview RowDataBound gridview template gridview templatefield gridview templatefield get control GridViewDeletedEventArgs hierarchical data how how to display date in gridview without time How to get value from TemplateField in GridView how to pass data from gridview to another page in image field imagefield images implement implementing insert inside javascript jquery KeepInEditMode Merging. merge microsoft multiple rows nested nested gridview nesting no data no rows in datasource object datasource object datasource in objectdatasource objectdatasource in order OverwriteChanges page page numbers page size paging pdf properties read xml file with child nodes c# Repeater Retrieve ItemTemplate control value in Gridview row cells rowcommand rowdatabound rowdatabound event RowDataBound example RowDeleted event RowUpdated several rows show date only in gridview showing sort sort arrows sort images sortable Sorting sqldatasource sqldatasource in stored procedures summary data templatefield totals tutorial two or more rows Update update data Updated updating updating data Use use optimistic concurrency using validation Validation Controls web server when without without data source controls without datasource controls Word workbook working with xmldatasource in xslt basics xslt example xslt to transform xml to xml xslt transformation xslt transformation c# example