While in autopostback selected Item Vanish from fileupload.

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protected void Page_Load(object sender, EventArgs e)
   {
       if (this.Session["FileUpload1"] == null && FileUpload1.HasFile)
       {
           this.Session["FileUpload1"] = FileUpload1;
       }
       else if (this.Session["FileUpload1"] != null && FileUpload1.HasFile)
       {
           FileUpload1 = (FileUpload)this.Session["FileUpload1"];
       }


       else  if (!IsPostBack)
       {



           Session["CheckRefresh"] = Server.UrlDecode(System.DateTime.Now.ToString());
           if (this.Session["FileUpload1"] == null && FileUpload1.HasFile)
           {
               this.Session["FileUpload1"] = FileUpload1;
           }
           else if (this.Session["FileUpload1"] != null && FileUpload1.HasFile)
           {
               FileUpload1 = (FileUpload)this.Session["FileUpload1"];
           }
           else if (FileUpload1.HasFile)
           {
               this.Session["FileUpload1"] = FileUpload1;
           }
           Bindstate();
           Bindclass();
       }
       else if (FileUpload1.HasFile)
       {
           this.Session["FileUpload1"] = FileUpload1;
       }
       else
       {
       }


   }

Posted 14-Jul-15 19:31pm

Arasappan

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mrDivan 15-Jul-15 3:07am

Good day

Please set the EnableViewState="true" on your control in your aspx page.

Kind regards
Divan

Arasappan 15-Jul-15 3:20am

I already set but it didn't work

2 solutions

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Sreekanth Mothukuru · Answer 1 · 2015-07-14T21:31:00

Solution 1

Place all your controls within Asp.net Update Panel. Also, in order to post the file to the server use Postback "trigger" on submit button.

Posted 14-Jul-15 21:31pm

Sreekanth Mothukuru

Comments

Arasappan 15-Jul-15 3:58am

Am also having update panel.. My problem is not postback the screen. while in ddl postpback the uploaded photo is vanished.

Sreekanth Mothukuru 15-Jul-15 4:11am

Where is the code to display uploaded photo on the page? Set a break point to see if the method having posted file value is null or not.

Arasappan 15-Jul-15 5:08am

value becomes null.

PRAKASH9 · Answer 2 · 2015-07-15T01:54:00

Solution 2

when page was post back at that time fileupload control will remove the file from the control so you have to change the dropdown at client side

Posted 15-Jul-15 1:54am

PRAKASH9

Updated 15-Jul-15 1:55am