Postback Issues inside GridView TemplateField

Question

The following code is causing me a postback when i select a value from the ajax combobox and as such the row position changes sometimes by 4-5 rows and sometimes even more. I have been working on it for the last 3 days but found no satisfactory solution. I also used scrollIntoView. But that too works sometimes only. Here is the code: ' CssClass="form-control" Visible=' ' onmouseover="show(this)" onmouseout="hide(this)" > ' CaseSensitive ="false" ItemInsertLocation="OrdinalValue" CssClass="form-group " Width="100%" onselectedindexchanged="cmbresultnew_SelectedIndexChanged" EnableViewState="true">

Prasad Raveendran · Answer

It looks like you're dealing with a postback issue caused by the onselectedindexchanged event of an AJAX ComboBox in a Web Forms application. To avoid the page jumping around and to maintain the row position after the postback, consider the following strategies: Maintain Scroll Position on Postback: Ensure that the scroll position is maintained after postback. ASP.NET provides a built-in mechanism for this. 2. Client-Side Handling: Use JavaScript to save the scroll position before the postback and restore it afterward. function saveScrollPosition() { var scrollPosition = document.documentElement.scrollTop || document.body.scrollTop; document.getElementById(' ').value = scrollPosition; } function restoreScrollPosition() { var scrollPosition = document.getElementById(' ').value; if (scrollPosition) { window.scrollTo(0, scrollPosition); } } window.onload = function() { restoreScrollPosition(); }; window.onbeforeunload = function() { saveScrollPosition(); }; In your ASPX page, include a hidden field to store the scroll position: 3. UpdatePanel: Wrap the ComboBox inside an UpdatePanel to enable partial page updates and avoid full page postbacks. ' onmouseover="show(this)" onmouseout="hide(this)" CaseSensitive="false" ItemInsertLocation="OrdinalValue" CssClass="form-group" Width="100%" onselectedindexchanged="cmbresultnew_SelectedIndexChanged" EnableViewState="true"> Prevent Full Postback: Handle the onselectedindexchanged event using AJAX to prevent a full postback. You can use PageMethods or an UpdatePanel for this purpose. Example using PageMethods : ' onmouseover="show(this)" onmouseout="hide(this)" CaseSensitive="false" ItemInsertLocation="OrdinalValue" CssClass="form-group" Width="100%" onselectedindexchanged="cmbresultnew_SelectedIndexChanged" EnableViewState="true"> In your code-behind, create a static method to handle the selection change: [WebMethod] public static void cmbresultnew_SelectedIndexChanged(string selectedValue) { // Your logic here } And in your JavaScript, call this method using PageMethods : function cmbresultnew_SelectedIndexChanged(sender, args) { PageMethods.cmbresultnew_SelectedIndexChanged(args.get_value(), onSuccess, onError); } function onSuccess(result) { // Success logic here } function onError(error) { // Error handling here } By using these strategies, you can minimize or eliminate the postback issues and maintain the scroll position of your page.