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Editorial Team
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Asked: 2026-05-13T23:23:31+00:00

The TextBox control offers a MaxLength property, which allows the insertable text into that

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The TextBox control offers a MaxLength property, which allows the insertable text into that TextBox be clientside limited to the specified amount of chars.

My questions:

  • Is this property only client-side and
    therefore browser-pedendent?
  • Can I rely on the fact, that the
    Text property contains no text longer than
    MaxLength is set (only for the
    DisplayModes named in the MSDN
    article) or do I manually have to
    perform a TextBox.Text.SubString(0,
    DesiredMaxLength)
    ?
  • How does all this
    behave with disabled java-script?
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1 Answer

  1. Editorial Team

    It does not depend on javascript but that does not make it safe.

    Anyone can still post a request using javascript (XmlHttpRequest for example) or just craft a request to send more data than the max-length specification. It’s a good way to stop a normal user from over populating a field but it is something you need to double check on the server anyway.

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