asp.net 验证以确保文本框具有整数值 [英] asp.net validation to make sure textbox has integer values

问题描述

我对文本框进行了必需的验证设置，但我还必须确保它是一个整数.

I have a required validation setup on a textbox, but I also have to make sure it is an integer.

我该怎么做?

推荐答案

如果你只关心字段包含一个整数(即不关心范围)，那么添加一个 CompareValidator 与它的 Operator属性设置为 DataTypeCheck:

If all that you are concerned about is that the field contains an integer (i.e., not concerned with a range), then add a CompareValidator with it's Operator property set to DataTypeCheck:

<asp:CompareValidator runat="server" Operator="DataTypeCheck" Type="Integer" 
 ControlToValidate="ValueTextBox" ErrorMessage="Value must be a whole number" />

如果有特定范围的有效值(可能有)，那么您可以使用 RangeValidator，像这样:

If there is a specific range of values that are valid (there probably are), then you can use a RangeValidator, like so:

<asp:RangeValidator runat="server" Type="Integer" 
MinimumValue="0" MaximumValue="400" ControlToValidate="ValueTextBox" 
ErrorMessage="Value must be a whole number between 0 and 400" />

这些只会验证文本框中是否有文本，因此您需要保留 RequiredFieldValidator 也有.

These will only validate if there is text in the TextBox, so you will need to keep the RequiredFieldValidator there, too.

作为 @Mahin 说，请确保检查 Page.IsValid 属性在服务器端，否则验证器仅适用于启用了 JavaScript 的用户.

As @Mahin said, make sure you check the Page.IsValid property on the server side, otherwise the validator only works for users with JavaScript enabled.

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