C#中的自定义验证错误 [英] ERROR on Custom Validation in c#

问题描述

错误是:

Error is:

String was not recognized as a valid DateTime.

自定义验证器的功能:

Function of Custom Validator:

protected void chkdate1(object sender, ServerValidateEventArgs e)
{
    IFormatProvider theCultureInfo = new System.Globalization.CultureInfo("en-GB", true);
    DateTime from = DateTime.ParseExact(txt_from_date.Text, "MM/dd/yyyy HH:mm:ss", theCultureInfo);
    DateTime to = DateTime.ParseExact(txt_to_date.Text, "MM/dd/yyyy HH:mm:ss", theCultureInfo);
}

自定义验证为:

Custom Validation is:

<asp:CustomValidator ID="scdt1" runat="server" OnServerValidate="chkdate1" ErrorMessage="To date not less than From date">

推荐答案

字符串未被识别为有效的DateTime.
您尝试将文本转换为日期的方式看起来不正确，并且会收到错误消息.

选择一个:
1.找到要在其中转换的区域性信息.

String was not recognized as a valid DateTime.
The way you are trying to convert text to date looks incorrect and you get the error.

Pick one:
1. Definding the culture info in which you want it to be converted.

string dateString = @"06/26/2012";
DateTime date2 = Convert.ToDateTime(dateString,	System.Globalization.CultureInfo.GetCultureInfo("en-GB").DateTimeFormat);

或

2. ParseExact方法:

Or

2.the ParseExact method:

string dateString = @"06/26/2012";
DateTime date3 = DateTime.ParseExact(dateString, @"MM/dd/yyyy HH:mm:ss", System.Globalization.CultureInfo.InvariantCulture);

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