The declarative controls of ASP.NET are really great. However, there are some times, when it may not seem so.Let's say you have a DropDownList which is bound by a DataSource control.Also, you have other pages hitting this page, with querystrings, and based on the item in the querystring, you'd like...
Converting DataRow to DataRowView is not possible, but we can go around this by using DefaultView property of the Data Row Table.The following code example demonstrate how to get DataRowView out of DataRow:DataTable dt = new DataTable();dt.Columns.Add("ID", typeof(int)); dt.Columns.Add("Name", typeof(string));for (int i = 0; i < 10; i++) { DataRow tempDR =...
I will show you three different methods to remove HTML tags from string in C#:1. By using Regex:public static string RemoveHTMLTags(string html) { return Regex.Replace(html, "<.*?>", string.Empty); }2. By using Compiled Regex for better performance:static Regex htmlRegex = new Regex("<.*?>", RegexOptions.Compiled); public static string RemoveHTMLTagsCompiled(string html) { return htmlRegex.Replace(html, string.Empty); }3. By...
We will assume that we have a Label control called "Label1" on your Master Page, you might want to change the text of that Label.To do that write this code in your content page:Label lbl = new Label(); lbl = (Label)Master.FindControl("Label1"); lbl.Text = "Text";Of course, this is all assuming the label is...
This class uses a symmetric key algorithm (Rijndael/AES) to encrypt and decrypt data. As long as encryption and decryption routines use the same parameters to generate the keys, the keys are guaranteed to be the same.In a real-life application, this may not be the most efficient way of handling encryption,...
This is a new feature in ASP .NET 2.0. The IButtonControl Interface contains a new property called PostBackUrl which points to the page to which the current page will postback, Button, ImageButton and LinkButton implements this interface and exposes the cross page postback functionality.When user clicks the button in the...
In this article we are going to show two examples of exporting to excel. First one is how to export grid view control to excel and the second one is how to export data table to excel.1-Export Grid View control to Excel:HtmlForm htmlForm = new HtmlForm(); string fileName = "attachment; filename=Reports.xls"; Response.ClearContent(); Response.AddHeader("content-disposition",...
We are going to use Gmail outgoing mail server in our code here to demonstrate how you can send an email from your application using C#SmtpClient oSmtpClient = new SmtpClient(); oSmtpClient.Host = "smtp.gmail.com"; //The Outgoing mail server oSmtpClient.Credentials = new NetworkCredential("Your Email", "Your password"); oSmtpClient.Port = 587; oSmtpClient.DeliveryMethod = SmtpDeliveryMethod.Network; oSmtpClient.EnableSsl = true; MailMessage msg =...
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,...
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;
