如何仅针对数字验证文本框。 [英] How to validate textbox only for number.

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问题描述

我想在asp.net中只输入数字int文本框,如果输入字符则不允许输入值不会显示给我。

喜欢给定链接中的密码

https://eaadhaar.uidai.gov.in/



在我的代码中,我可以输入字符然后调用函数并对其进行验证然后删除。



我希望该用户在输入(字符)后无法看到字符。



我的给定代码在按键上单独控制文本框上工作。



我尝试过:



< asp:TextBox runat =serverID =txtPinCodeMaxLength =6Width =200onkeypress = return IsValidPinCode(event,this)>< / asp:TextBox> 



  function  IsValidPinCode(e,t){
try {
var entered = S.特林 .fromCharCode(e.which);

if (e.keyCode!= 8 ){
var regExpression = / ^ \d { 0 6 } $ /;
if (!regExpression.test(输入)){

e.preventDefault();
}

}
}
catch (错误){
alert(错误。描述);
}
}



从c#拨打电话无效



  protected   void  grdSavedDDO_RowDataBound( object  sender,GridViewRowEventArgs e)
{

if (e.Row.RowType == DataControlRowType.DataRow)
{

if ((e.Row.RowState& DataControlRowState.Edit)> 0
{
TextBox txtPinCode =(TextBox)e.Row.FindControl( txtPinCode);

txtPinCode.Attributes.Add( onchange javascript:return IsValidPinCode(' + e + ',' + + '));
}

}
}

解决方案

/;
if (!regExpression.test(输入)){

e.preventDefault();
}

}
}
catch (错误){
alert(错误。描述);
}
}



从c#拨打电话无效



  protected   void  grdSavedDDO_RowDataBound( object  sender,GridViewRowEventArgs e)
{

if (e.Row.RowType == DataControlRowType.DataRow)
{

if ((e.Row.RowState& DataControlRowState.Edit)> 0
{
TextBox txtPinCode =(TextBox)e.Row.FindControl( txtPinCode);

txtPinCode.Attributes.Add( onchange javascript:return IsValidPinCode(' + e + ',' + + '));
}

}
}


如果我理解正确,你只想取消按键,如果不是数字。添加 onkeypress 事件并将其绑定到此函数:

 函数 pinCodeKeyPress(e){
var 输入= 字符串 .fromCharCode(e 。哪一个); // e.which是一个整数:char代码。 'entered'是单字符字符串
var regExpression = / ^ [0-9]


< BLOCKQUOTE> /;
if (!regExpression.test(输入)){
e.preventDefault(); // 'cancel'事件,字符不会出现在文本框中
}
}



重要:不仅要依赖客户端验证!用户可以轻松禁用此验证。不要忘记在服务器上添加一种验证。


I want enter only number int textbox in asp.net and if enter character it will not allowed and enter value does not show to me.
like pincode in given link
https://eaadhaar.uidai.gov.in/

In my code I am able to type character then function is called and validate it then remove.

I want to that user are not able to see character if entered(character).

My given code is working on text box in separate control on keypress.

What I have tried:

<asp:TextBox runat="server" ID="txtPinCode" MaxLength="6" Width="200" onkeypress="return IsValidPinCode(event,this)"></asp:TextBox>


function IsValidPinCode(e, t) {
    try {
        var entered = String.fromCharCode(e.which);

        if (e.keyCode != 8) {
            var regExpression = /^\d{0,6}$/;
            if (!regExpression.test(entered)) {

                e.preventDefault();
            }

        }
        }
    catch (err) {
        alert(err.Description);
    }
}


Calling from c# is not working


protected void grdSavedDDO_RowDataBound(object sender, GridViewRowEventArgs e)
    {
      
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
               
                if ((e.Row.RowState & DataControlRowState.Edit) > 0)
                {                   
                    TextBox txtPinCode = (TextBox)e.Row.FindControl("txtPinCode");
                               
                    txtPinCode.Attributes.Add("onchange", "javascript:return IsValidPinCode('" + e + "','" + this + "')");   
                }

}
}

解决方案

/; if (!regExpression.test(entered)) { e.preventDefault(); } } } catch (err) { alert(err.Description); } }


Calling from c# is not working


protected void grdSavedDDO_RowDataBound(object sender, GridViewRowEventArgs e)
    {
      
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
               
                if ((e.Row.RowState & DataControlRowState.Edit) > 0)
                {                   
                    TextBox txtPinCode = (TextBox)e.Row.FindControl("txtPinCode");
                               
                    txtPinCode.Attributes.Add("onchange", "javascript:return IsValidPinCode('" + e + "','" + this + "')");   
                }

}
}


If I understand correctly, you just want to 'cancel' the key press if it's not a digit. Add a onkeypress event and bind it to this function:

function pinCodeKeyPress(e) {
    var entered = String.fromCharCode(e.which); // e.which is an integer: the char code. 'entered' is a single-character string
    var regExpression = /^[0-9]


/; if (!regExpression.test(entered)) { e.preventDefault(); // 'cancel' event, the char won't appear in the textbox } }


Important: do not only rely on client-side validation! A user can easily disable this validation. Don't forget to add a sort of validation on your server, too.


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