ASP.NET Web 表单自定义验证器未触发
我的页面上有一个用于文件上传控件的自定义验证器。
<asp:FileUpload ID="fuVendorBrief" runat="server" />
<br />
<asp:CustomValidator ID="cvVendorBriefFile" Display="Dynamic" runat="server" ValidationGroup="EditorValidate" ControlToValidate="fuVendorBrief" OnServerValidate="cvVendorBriefFile_ServerValidate" ErrorMessage="You must upload a vendor brief PDF file.">
</asp:CustomValidator>
然后我还有一个按钮。
<asp:Button ID="btnSubmit" ValidationGroup="EditorValidate" OnClick="btnSubmit_Click" runat="server" Text="Add Vendor Brief" />
我已经像这样定义了我的自定义验证器事件...
protected void cvVendorBriefFile_ServerValidate(object source, ServerValidateEventArgs args)
{
CustomValidator fileUploadValidator = (CustomValidator)source;
FileUpload vendorBriefFileUpload = (FileUpload)fileUploadValidator.Parent.FindControl(fileUploadValidator.ControlToValidate);
args.IsValid = vendorBriefFileUpload.HasFile && vendorBriefFileUpload.FileName.ToLower().EndsWith(".pdf");
}
这个自定义验证器甚至没有被解雇。在我看来一切都很好。如果我在服务器验证事件中的任何位置放置断点，那么当我单击“提交”时，它不会被命中。不过，我可以在提交按钮的单击事件中命中断点。
有什么想法吗？
编辑 - 我在页面上有其他验证控件，例如必填字段验证器，并且它们运行得很好。
编辑2 - 如果您想要页面及其代码隐藏的完整源代码，请点击以下链接：
I have a custom validator on my page for a file upload control.
<asp:FileUpload ID="fuVendorBrief" runat="server" />
<br />
<asp:CustomValidator ID="cvVendorBriefFile" Display="Dynamic" runat="server" ValidationGroup="EditorValidate" ControlToValidate="fuVendorBrief" OnServerValidate="cvVendorBriefFile_ServerValidate" ErrorMessage="You must upload a vendor brief PDF file.">
</asp:CustomValidator>
I then also have a button.
<asp:Button ID="btnSubmit" ValidationGroup="EditorValidate" OnClick="btnSubmit_Click" runat="server" Text="Add Vendor Brief" />
I have defined my custom validator event like so...
protected void cvVendorBriefFile_ServerValidate(object source, ServerValidateEventArgs args)
{
CustomValidator fileUploadValidator = (CustomValidator)source;
FileUpload vendorBriefFileUpload = (FileUpload)fileUploadValidator.Parent.FindControl(fileUploadValidator.ControlToValidate);
args.IsValid = vendorBriefFileUpload.HasFile && vendorBriefFileUpload.FileName.ToLower().EndsWith(".pdf");
}
This custom validator isn't even getting fired. Everything looks alright to me. If I drop a breakpoint anywhere in the server validation event it does not get hit when I click submit. I can hit breakpoints in the submit button's click event however.
Any ideas?
EDIT - I have other validation controls, like required field validators, on the page and they fire just fine.
EDIT 2 - If you want the full source of the page and its codebehind then follow these links:
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您需要为按钮和验证器指定相同的 ValidationGroup=""
You need to specify the same ValidationGroup="" to your button, and to your validators
对我来说，当验证器及其相关输入位于在控件标记中设置了
visible="false"的控件内时，就会发生这种情况。这导致 CustomValidator 继承Visible = false属性并阻止验证触发。在正常的页面加载中，直到页面生命周期的后期我才使控件可见。无论如何，如果您在
Page.Validate()方法上设置断点，您可以检查Page.Validators集合，看看是否会发生类似的情况。For me this occurred when the validator and its related input were inside a control that had
visible="false"set in the control mark up. This was causing the CustomValidator to inherit theVisible = falseproperty and preventing validation from firing. On a normal page load I wasn't making the controls visible until later in the page lifecycle.In any case if you set a breakpoint on the
Page.Validate()method you can inspect thePage.Validatorscollection and see if a similar thing might be happening to you.将
CausesValidation="True"添加到您的 Button 声明中。Add
CausesValidation="True"to your Button declaration.如果您查看http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&l=EN-US&k=k(%22ASP%3aCUSTOMVALIDATOR% 22);k(VS.HTMLDESIGNER.HTML);k(TargetFrameworkMoniker-%22.NETFRAMEWORK%2cVERSION%3dV3.5%22);k(DevLang-ASPX)&rd=true
你看
那么，是否正在测试页面加载中的
Page.IsValid？If you look to the documentation at http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&l=EN-US&k=k(%22ASP%3aCUSTOMVALIDATOR%22);k(VS.HTMLDESIGNER.HTML);k(TargetFrameworkMoniker-%22.NETFRAMEWORK%2cVERSION%3dV3.5%22);k(DevLang-ASPX)&rd=true
you see
So, are in testing for
Page.IsValidin your Page Load?尝试完全删除
ControlToValidate。尽管我以前从未尝试过验证文件上传，但如果内容为空，大多数验证器都不会触发（RequiredField除外）。取消控制进行验证应使其始终为该组触发。编辑 (Chevex) -
ControlToValidate是问题所在，但并不是因为它被破坏了。默认情况下，它不会在没有值的控件上触发，如上所述。设置自定义验证器控件属性ValidateEmptyText="true"可以解决该问题。遗憾的是我不得不开始这个巨大的问题只是为了找到这一点，但现在我们知道了！ :)Try removing
ControlToValidateentirely. Though I've never tried to validate a file upload before, most validators won't fire (exceptRequiredField) if the contents are empty. Taking off the control to validate should make it fire always for that group.EDIT (Chevex) - The
ControlToValidatewas the issue, but not because it was broken. By default it will not fire on controls with no value, as stated above. Setting the custom validator control propertyValidateEmptyText="true"solves the issue. Sad that I had to start this giant question just to find that, but now we know! :)