如何在ASP.net AjaxFileUploader中验证RequiredFieldValidator

问题描述：

I am using AjaxFileUploader to upload multiple files in my ASP.net project.

I want to validate RequiredFieldValidator on It, Means at least one file must be Upload before submit Form.

My Code is:

<ajaxToolkit:AjaxFileUpload

    id="ajaxUpload1" ThrobberID="MyThrobber1" MaximumNumberOfFiles="5" runat="server" AllowedFileTypes="jpg,png"></ajaxToolkit:AjaxFileUpload>

如何将此控件验证为Requiredfiled，因为Simple RequiredFieldValidator不起作用。

有没有其他解决方案???

How can validate this control as Requiredfiled, because Simple RequiredFieldValidator does not work on it.

is there any other solution ???

答

Apply Below given Custom Validator on file Upload Control

<asp:CustomValidator CssClass="asterisk" ID="CustomValidator1" runat="server" Display="Dynamic" ControlToValidate="FileUploadCtrl" ErrorMessage="Please browse file to Upload"        SetFocusOnError="true" ValidateEmptyText="True" ValidationGroup="ValGrp"

                                        ClientValidationFunction="CheckFile">
</asp:CustomValidator>

Write below javascript
  function CheckFile(source, arguments) {

        var path = document.getElementById('<%= FileUploadCtrl.ClientID %>').value;
        if (path != "")
            arguments.IsValid = true;
        else
            arguments.IsValid = false;
    }

肯定能帮到你

It will definitely help you

你可以尝试这个代码java脚本。

var file = document.getElementById（'AjaxFileUpload1.HasAttributes'）。value;

if（ file == null）

{

alert（'选择你的文件'）;

}

更多信息请输入您的代码..

you can try this code in java script.

var file= document.getElementById('AjaxFileUpload1.HasAttributes').value;
if(file==null)
{
alert('select your file');

}

more information place your code..

如何在ASP.net AjaxFileUploader中验证RequiredFieldValidator

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