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POImplementation of delegates in C#
 

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    <p>I am trying to learn on how to use delegates efficiently in C# and I was just wondering if anyone can guide me through... The following is a sample implementation using delegates... All I am doing is just passing a value through a delegate from one class to another... Please tell me if this is the right way to implement... And also your suggestions... </p> <p>Also, please note that I have de-registered the delegate in :</p> <pre><code>void FrmSample_FormClosing(object sender, FormClosingEventArgs e) { sampleObj.AssignValue -= new Sample.AssignValueDelegate(AssignValue); } </code></pre> <p>Is this de-registration necessary?</p> <p>The following is the code that I have written.. </p> <pre><code>public partial class FrmSample : Form { Sample sampleObj; public FrmSample() { InitializeComponent(); this.Load += new EventHandler(FrmSample_Load); this.FormClosing += new FormClosingEventHandler(FrmSample_FormClosing); sampleObj = new Sample(); sampleObj.AssignValue = new Sample.AssignValueDelegate(AssignValue); } void FrmSample_FormClosing(object sender, FormClosingEventArgs e) { sampleObj.AssignValue -= new Sample.AssignValueDelegate(AssignValue); } void FrmSample_Load(object sender, EventArgs e) { sampleObj.LoadValue(); } void AssignValue(string value) { MessageBox.Show(value); } } class Sample { public delegate void AssignValueDelegate(string value); public AssignValueDelegate AssignValue; internal void LoadValue() { if (AssignValue != null) { AssignValue("This is a test message"); } } } </code></pre> <p>Pls provide your feedback on whether this is right...</p> <p>Thanks, Ram</p>
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    1. COpossible duplicate of http://stackoverflow.com/questions/1788032/what-is-delegate-and-delegate-methods
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      1. USGeorge Stocker
    2. COHi George, I dun think it is a duplication of the question that you have linked to.. Here, the main purpose of the question was to know whether we have to explicitly de-register the delegate or not...
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