What Captcha stand for?Completely Automated Public Turing test to tell Computers and Humans Apart. The Captcha technology help you to make sure your site is reasonably secure against automated attacks.Write the following code in a class named Captcha:public class Captcha { //make the captcha image for text public Bitmap MakeCaptchaImage(string txt,...
Server.Transfer processes the page from one page directly to the next page without making a round-trip back to the client's browser. This way is faster, with a little less overhead on the server. However, it does not update the clients URL history list or current URL.Response.Redirect, as expected, is used...
If you are using ajax by using UpdatePanel, and there is a control inside the UpdatePanel causes a postback that would normally run Javascript, and you find the Javascript is not running, add a postback trigger to the UpdatePanel using the ID of the control that causes the postback.
In order to make all dates before the current date, not able to be selected, in the onDayRender event for your Calendar:if (e.Day.Date < DateTime.Today) { e.Day.IsSelectable = false; }To make it more obvious to the end user, also add:e.Cell.BackColor = Drawing.Color.GhostWhite; e.Cell.ForeColor = Drawing.Color.Gainsboro;
After you finish your ASP.NET Application "Developing and Testing", and before you upload the application to a production server, don't forget to change the value of debug="true" to false in the compilation section in the Web.Config file.This would increase the performance of your web application.
When a page loads, in order to get the name of the page that sent you there, all you need to use is:Request.UrlReferrer.ToString();You can create a global variable to hold it:string sReferrer = "";Then, in the Page_Load event, assign it:if (!Page.IsPostback) { sReferrer = Request.UrlReferrer.ToString(); }Or, you can put...
If you have an editable Gridview and you need to change the backcolor of the row you are editing, just write these tow lines of code in the Gridview's RowEditing Event.MyGridView.SelectedIndex = e.NewEditIndex; MyGridView.SelectedRow.BackColor = Drawing.Color.Red;
Lots of users click the delete button within the GridView with no attention then the result is that the item will be deleted from the GridView, so we can add confirmation message to appear to tell the user "Are you sure you want to delete this item?".First of all we have to...
Sometimes we need to add a static item to the top of DropDownList web control, such as "-- Please select --" or any other text. This static item will be removed and replaced with the items that comes from the data source you are using after calling DataBind() method. To keep the...
We were working on a database which has a column for storing an image path. The path has been changed and we need now to update that column with the new path.Please find below a simple SQL update statement that replaces text, you may use it with any column that...
