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What is ASCX? ASCX is used as the file extension for ASP.NET User Control files. .ASCX files are text files that are used to store ASP (Acitve Server Page) user control source code. See the sample .ASCX file included below.

File Extension: .ASCX

MIME Type: text/plain

File Content: ASP.NET User Control

.ASCX files are ASP.NET User Control files, that are used to store ASP (Acitve Server Page) user control source code. Here is a sample .ASCX ASP.NET User Control file, address.ascx:

<script language="C#" runat="server">

  public String Caption = "Address";
  public bool _showcaption = true;

  public Boolean ShowCaption {
      get {
          return _showcaption;
      }
      set {
          _showcaption = value;
      }
  }
...
</script>

<span ></span>
<p>
<table style="font: 10pt verdana">
<% if (ShowCaption) { %>
  <tr>
    <td colspan="6" style="padding-bottom:10">
      <b><%=Caption%></b>
    </td>
  </tr>
<% } %>
  <tr>
    <td>
      Address: 
    </td>
    <td colspan="5">
      <input id="TxtAddress" size="50" type="text" runat="server">
    </td>
  </tr>
...
</table>

.ASCX ASP.NET User Control file sample: Click sample.ascx to download.

Since .ASCX files are in text format, you can use Notepad or any text editor to create or modify them. No special software is needed.

For for information on how to use .ASCX ASP.NET User Control files, see links below:

• UserControl Class, by Microsoft.