在asp文本框中只允许正数？ [英] allow only positive number in asp textbox ?

问题描述

hi
请问我怎么才允许整数正数插入到asp.net文本框中？







请帮助：）

解决方案

正值大于零。所以，测试这个值的逻辑就像这个，

  if (Convert.ToInt16（textBox1.Text）>   0 ）{
 < span class =code-comment> //   positive  
}  else  {
  //  负值 
} 

这将执行任一方法，具体取决于textBox1的值（您也可以使用自己的变量和控件）。

尝试使用两个 CompareValidator [ ^ ]验证人：

< pre lang =asp.net> < asp：TextBox id = YourTextBox runat = server / >

< asp：CompareValidator runat = server

ControlToValidate = YourTextBox

运算符 = DataTypeCheck

输入 = 整数

ErrorMessage = 输入有效的整数

显示 = 动态

文本 = *

/ >

< asp：CompareValidator runat = server

ControlToValidate = YourTextBox

运算符 = GreaterThanEqual

< span class =code-attribute> ValueToCompare = 0

类型 = 整数

< span class =code-attribute> ErrorMessage = 整数不能小于零

显示 = 动态

文字 = *

/ >

hi please how can i allow only integer positive to insert into asp.net textbox ?



please help :)

解决方案

A positive value is greater than zero. So, the logic to test this value would be like this one,

if(Convert.ToInt16(textBox1.Text) > 0) {
  // positive
} else {
  // negative value
}

This would execute either method depending on the value of the textBox1 (you can use your own variables and controls here too).

Try using two CompareValidator[^] validators:

<asp:TextBox id="YourTextBox" runat="server" />

<asp:CompareValidator runat="server"

    ControlToValidate="YourTextBox"

    Operator="DataTypeCheck"

    Type="Integer"

    ErrorMessage="Enter a valid integer"

    Display="Dynamic"

    Text="*"

/>

<asp:CompareValidator runat="server"

    ControlToValidate="YourTextBox"

    Operator="GreaterThanEqual"

    ValueToCompare="0"

    Type="Integer"

    ErrorMessage="The integer cannot be less than zero"

    Display="Dynamic"

    Text="*"

/>

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