If you set AllowPaging="true" or AllowSorting="true" on a GridView control without using a DataSourceControl DataSource (i.e. SqlDataSource, ObjectDataSource), you will run into the following errors: When changing the page on the GridView control: The GridView 'GridViewID' fired event...

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Until recently, I was using a modified version of the below code that was SQL Server-based for light weight data access. I've since introduced .NET generics to make it database independent. The below code is perfect for smaller projects where a component such as Enterprise Library or IBatis might be...

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For a side project I'm working on, explicit operators have come in handy in the data layer. With explicit operators, you can convert from one class to another using a user-defined conversion operator. For example: public class MyClass { private int _id; private string _description; public int ID...

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Some people may not know that .NET 2.0 provides APIs for accessing everything in a configuration file. The most common question I see relates to accessing the mail settings in the system.net node programmatically. C# using System.Configuration; using System.Web.Configuration; using System.Net.Configuration;...

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Below is a C# and VB.NET class that demonstrates using System.Net.Mail to send an email. Download C# System.Net.Mail Helper Download VB.NET System.Net.Mail Helper Calling the function from code MailHelper .SendMailMessage( "fromAddress@yourdomain.com" , "toAddress@yourdomain.com"...

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I'm in the progress of upgrading a web application from .NET 1.1 to 2.0 and came across this function that I created which replaces all instances of date/time in a string. In the application users add notes and when it gets saved to the database it appends Added By [User] on [Date/Time] to the end...

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Let's say for instance, you want to create a List of your own class, say Employee, where Employee represents an employee. First, we'll start by creating an employee class. [ Serializable ] public class Employee { private bool m_IsSalaried; private int m_Age; private string m_Email; private string m_Name;...

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One of the weirder features in C# 2.0 is nullable types. My thinking is as follows: Why complicate things with Nullable<T>, or its shorter version of DataType? (i.e. int?), instead of allowing null values to be assigned to those data types that don't have any way of handling null? Maybe it was...

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Need to access an HttpContext object in a class, but can't because the class doesn't inherit System.Web.UI.Page? Here is a simple helper class that will allow you to access some of the most common HttpContext objects. C# using System; using System.Web; using System.Web.Caching; using System.Web.SessionState;...

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A common DropDownList issue I've seen on many forums and lists is about a DropDownList populating items 2x or not being able to get the selected value on postback when binding to a data source. This is due to the DropDownList having data bound to it again on postback before the form is processed. To...

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I just answered a post on one of the lists I am a member of that asked how to use pointers in C#. Using pointers in C# is a very bad idea. Pointers reference a location in memory. If the garbage collector is called, the location of an object in memory could be moved and the end result is obvious. As...

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Earlier I posted about C# Version 3.0 . I found this blog entry on C# 4.0 (codenamed Yoda) - http://blogs.msdn.com/mattwar/archive/2005/10/09/479008.aspx . R...

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The .NET Framwork 2.0 introduces Eval() . Eval() is a shortcut for Container.DataItem() . Since Eval() uses Reflection, it causes overhead. From a optimization standpoint, it is better to use Container.DataItem() . VB.NET Container.DataItem() C# DataReader: ((System.Data.Common.DbDataRecord)Container...

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