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String field MaxLength
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mikewishart View Drop Down
Groupie
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Joined: 26-Feb-2010
Location: Reno, NV
Posts: 49 		Post Options Post Options   Quote mikewishart Quote  Post ReplyReply Direct Link To This Post Topic: String field MaxLength
    Posted: 13-Sep-2010 at 2:29pm
I'd like to make it a little easier to determine the maximum length of a string field rather than hardcoding it in a few places.  Is there any DevForce equivalent to the solution presented here?

http://stackoverflow.com/questions/748939/field-max-length-in-entity-framwork
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DenisK View Drop Down
IdeaBlade
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Joined: 25-Aug-2010
Posts: 715 		Post Options Post Options   Quote DenisK Quote  Post ReplyReply Direct Link To This Post Posted: 14-Sep-2010 at 11:17am
Hi Mike;

I'm assuming that you want to get the MaxValue of the StringLengthVerifierAttribute. If so, we can create a function that can be passed any DevForce entity and its property, and using its type and property name, we can using Reflections to get its MaxValue of the StringLengthVerifierAttribute. Please see code samples below.

public void GetMaxStringLengthSample() {
      var maxStringLength = GetMaxStringLengthAttribute(typeof(Customer),                     
         Customer.PropertyMetadata.CompanyName.Name);
      
       Assert.IsTrue(maxStringLength == 40, "This should not fail");
}

public int GetMaxStringLengthAttribute(Type entityType, String propertyName) {
      var propertyInfo = entityType.GetProperty(propertyName);
      var attributes = (StringLengthVerifierAttribute)propertyInfo
        .GetCustomAttributes(typeof(StringLengthVerifierAttribute), false).First();

      return attributes.MaxValue;
}
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mikewishart View Drop Down
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Joined: 26-Feb-2010
Location: Reno, NV
Posts: 49 		Post Options Post Options   Quote mikewishart Quote  Post ReplyReply Direct Link To This Post Posted: 14-Sep-2010 at 12:00pm
That will work.  Thank you!
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