ASP.NET中關於上傳附件的大小設定問題

Asp.net中，上傳檔案的預設大小是4096 KB，也就是4M，不過你可以在Web.config中更改這個資料

<httpRuntime maxRequestLength="10240"

         useFullyQualifiedRedirectUrl="true"

         executionTimeout="100"/>

那麼此時就是10M的檔案，當然你也可以把它修改的更大，但是不管改成多大都會有個極限，如果使用者上傳的檔案比這個值大，就會出現程式Catch不到的異常，因為這個是在運行時才能夠監測，如下的錯誤：

Action canceled
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Please try the following: Click the Refresh button, or try again later. If you have visited this page previously and you want to view what has been stored on your computer, click File, and then click Work Offline. For information about offline browsing with Internet Explorer, click the Help menu, and then click Contents and Index.

 

雖然你在代碼中控制了大小，不過程式在運行到這裡之前已經崩潰了

// Attachment size is too larger

if(PersonPhoto.PostedFile.ContentLength > 10240)

{

    this.lblError.Text = "The file you selected is larger than 10MB";

    this.lblError.Visible = true;

    return;

}

大家有什麼辦法嘛？