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PODisplay leading zeroes in numericupdown control (C#)
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  1. PODisplay leading zeroes in numericupdown control (C#)
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    copied!<p>I have a numericupdown control on a C# Windows Form, and am interested in adding a leading zero to its value if it is &lt; 10. (It is for the user to enter the minutes value of a time.)</p> <p>I am not very familiar with overrides/inheriting yet in C# but it is looking as though I may have to do that.</p> <p>It looks like <a href="http://www.eggheadcafe.com/conversation.aspx?messageid=33748685&amp;threadid=31842634" rel="nofollow noreferrer">this post</a> on EggheadCafe has the answer I need. Is it as simple as making a new class and then creating a control of that new class?</p> <pre><code>public class TestNum : NumericUpDown { protected override void ValidateEditText() { if (base.UserEdit) { base.ValidateEditText(); } } protected override void UpdateEditText() { Text = Convert.ToInt32(base.Value).ToString("00"); } } </code></pre> <p>When I try this, I am not sure how to create the new control that takes advantage of this class. I am using Visual Studio 2008. Still very new to windows forms. Thanks for any advice.</p> <p><strong>EDIT</strong></p> <p>I was able to make this work by editing the Designer-created code so that instead of the new control being of the original class, it was of the new one. So after adding the class above, I did the following (these changes are in two different locations, but I am only showing the lines that mattered):</p> <p>Changed:</p> <pre><code>this.numTest = new System.Windows.Forms.NumericUpDown(); private System.Windows.Forms.NumericUpDown numTest; </code></pre> <p>To:</p> <pre><code>this.numTest = new SampleForm.TestNum(); private TestNum numTest; </code></pre>
 

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