文件上传和javascript或自定义验证器 [英] Fileupload and javascript or custom validator

问题描述

你好，

我有一个asp:fileupload用于上传文件.
但是我需要一些JavaScript或可以使用自定义验证器来显示fileupload的内容长度不能超过限制.

Hello,

i have a asp:fileupload for uploading files.
But i need some javascript or can use custom validator to show the content length of fileupload can not exceed a limit.

推荐答案

使用自定义验证器控件.
http://www.codedigest.com/CodeDigest/65文件大小验证在File-Upload-控件中的ASP-Net.aspx

使用Javascript
http://forums.asp.net/t/1373336.aspx

Using Custom Validator Control.
http://www.codedigest.com/CodeDigest/65-File-Size-Validation-in-FileUpload-control-in-ASP-Net.aspx

Using Javascript
http://forums.asp.net/t/1373336.aspx

<asp:fileupload id="FileUpload1" runat="server" xmlns:asp="#unknown" />

将div放在

Put a div behind

保留错误消息

to hold the error message

<div id="spnErrorLogo" runat="server">
                                            </div>

现在在代码后面添加以下代码

Now add the following code at code behind

Int64 intFileSize = Convert.ToInt64(FileUpload1.PostedFile.ContentLength);
                if (intFileSize > 3145728)
                {
                    spnErrorLogo.InnerHtml = "Maximum file size exceeded.
 Please upload a file less than 3 MB in size.";
}

如果要上传较大类型的文件
在Web.config中

If you are uploading larger type file
in Web.config

<system.web>

<httpruntime>
executionTimeout="90" 
maxRequestLength="4096" 
useFullyQualifiedRedirectUrl="false" 
minFreeThreads="8" 
minLocalRequestFreeThreads="4" 
appRequestQueueLimit="100" 
enableVersionHeader="true"
/>
    </system.web></httpruntime>

将值更改为您选择的其他值(8 Mb为8192，16 Mb为16384，64 Mb为65536.
可能会帮助

change the value to some other value of your choice (8192 for 8 Mb, 16384 for 16 Mb, 65536 for 64 Mb.
may help

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