Asp.Net: Databinding a array of strings

by Pieter Brinkman 30. January 2009 03:47

You can use a string array as datasource and view the string values by using the Container.DataItem property.

Code example

Codebehind:

string[] testData = {"1","two","3","4"};
rptDemo.DataSource = testData;
rptDemo.DataBind();

And in the .aspx:

<asp:Repeater runat="server" ID="rptDemo">
    <ItemTemplate>
        <%# Container.DataItem %>
    </ItemTemplate>
</asp:Repeater>

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Tags: databind, container, dataitem, array, string

ASP.Net | Controls

String Extension Method: IsGuid()

by Pieter Brinkman 23. June 2008 08:46

I wrote an extension method for the string type. With this method you can check if an string is an Guid. The method returns a Bool.

public static class StringExtensions
{
public static bool IsGuid(this string input)
{
    Regex isGuid = new Regex(@"^(\{){0,1}[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}(\}){0,1}$", RegexOptions.Compiled);
    bool isValid = false;
    if (input != null)
    {
      if (isGuid.IsMatch(input))
      {
        isValid = true;
      }
    }
return isValid;
}
}

If you're wondering I didn't wrote the Regex myself :-) (but it works)

This brute-force method is mutch faster (thanks to Arjan and Tag for the comments):

public static bool IsGuid(this string input)
{
try
{
new Guid(input);
return true;
}
catch (ArgumentNullException) {}
catch (FormatException) {}
catch (OverflowException) {}
return false;
}