Asp.net verifies control usage

Last Update:2018-12-07 Source: Internet

Author: User

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1. Use images to Display error messages <Body>
<Form id = "form1" runat = "server">
<Asp: TextBox ID = "txtInt" runat = "server"> </asp: TextBox>

<Asp: CustomValidator ID = "CustomValidator1" runat = "server"
ClientValidationFunction = "validate_Integer" Display = "Dynamic"
ErrorMessage = "
</Asp: CustomValidator> <br/>

<Asp: Button ID = "Button1" runat = "server" Text = "Button"/>
</Form>
</Body>

The javascript function validate_Integer is called, so the script code is inserted between <Script type = "text/javascript" language = "javascript">
Function isInteger (s)
{
Var I;
For (I = 0; I <s. length; I ++)
{// Check whether the character is a number
Var c = s. charAt (I );
If (c <"0") | (c> "9") return false;
}
Return true;
}

Function validate_Integer (source, args)
{
Var txtintval = document. getElementById ("<% = txtInt. ClientID %> ");
If (! IsInteger (txtintval. value ))
{
Args. IsValid = false;
}
Else
{
Args. IsValid = true;
}
}
</Script>

2. Use RequiredFieldValidator for non-empty Verification
1. traditional verification methods
Specify the verification error message by setting its ErrorMessage attribute <Asp: TextBox ID = "TextBox1" runat = "server"> </asp: TextBox> & nbsp;
<Asp: RequiredFieldValidator ID = "RequiredFieldValidator1" runat = "server"
ControlToValidate = "TextBox1" EnableClientScript = "False" ErrorMessage = "* The input field cannot be blank! ">
</Asp: RequiredFieldValidator>

2. A JavaScript Prompt window is displayed.
You only need to assign the Text property of the verification control to a JavaScript code. <Asp: TextBox ID = "TextBox2" runat = "server"> </asp: TextBox> & nbsp;
<Asp: RequiredFieldValidator ID = "RequiredFieldValidator2" runat = "server"
ControlToValidate = "TextBox2" EnableClientScript = "False" ErrorMessage = "RequiredFieldValidator"
Text = "<script type = 'text/javascript '> alert (' * The input field cannot be blank! ') </Script> ">
</Asp: RequiredFieldValidator>

3. Verification with sound prompts. You can also use an image as an error message.
<Body>
<Form id = "form1" runat = "server">
<Asp: TextBox ID = "TextBox3" runat = "server"> </asp: TextBox> & nbsp;

<Asp: RequiredFieldValidator ID = "RequiredFieldValidator3" runat = "server"
ControlToValidate = "TextBox3"
EnableClientScript = "False"
ErrorMessage = "RequiredFieldValidator"
Text = "<bgsound src+'demo1.wav '>">
</Asp: RequiredFieldValidator>

<Asp: Button ID = "Button1" runat = "server" Text = "Button"/>
</Form>
</Body>

From: http://www.cnblogs.com/beniao/archive/2008/07/06/1236330.html

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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Asp.net verifies control usage

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