获取文本框以接受负数 [英] Getting a textbox to accept negative number

问题描述

我的表单上有三个文本框。用户可以输入负数，文本框可以使用它进行计算，但是当用户单击提交按钮时，验证将触发。如何让验证工作并传递负数？

I have a form that has three textboxes on it. The user can enter a negative number and the textboxes does the calculations with it but when the user clicks on the submit button the validation fires. How can I get the validation to work and pass the negative numbers?

<td>
                <asp:TextBox ID="TextBoxTA" runat="server" Width="180px">0</asp:TextBox>
                <asp:Label ID="lblreq20" runat="server" CssClass="style52" Text="*"></asp:Label>
                <asp:RegularExpressionValidator ID="RegularExpressionValidator33" 

                    runat="server" ControlToValidate="TextBoxTA" CssClass="style45" 

                    ErrorMessage="You Must Enter A Number For This Field" ForeColor="Red" 

                    ValidationExpression="^\d+$"></asp:RegularExpressionValidator>
            </td>

推荐答案

> < / asp：RegularExpressionValidator >
< < span class =code-leadattribute> / td >

It应该是：

It should be:

^[-]?\d+

开头你需要一个[ - ]来接受负号，[ - ]？表示零或一个负号。

You need a "[-]" at the beginning to accept negative sign, and "[-]?" means zero or one negative sign.

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