c# - ASP.NET page not going to server after button click -

i have asp.net page use in popup. pop contains 2 image controls , markup contains jcrop plugin. page, popup opens , hence page loads. reading image in bytes, converting base64 , setting src attribute of both image controls(both have runat='server'). there 2 buttons in page. click on these buttons not hitting event handler page_load, button_clicked etc.

<img id="target" runat="server" alt="main image" /> <img id="imgcropped" runat="server" alt="preview image" class="jcrop-preview" style="border-color:gray" />  protected void page_load(object sender, eventargs e)     {         strmimetype = session["mimetype"].tostring();         strimagedata = session["imagedata"].tostring();         strimagename = session["imagename"].tostring();         if (!ispostback)         {             string stemp = "data:" + strmimetype + ";base64," + strimagedata;             target.src = stemp;             imgcropped.src = stemp;         }     } 

below code when user selects image file , hit uploadclick button.

protected void btnuploadclick(object sender, eventargs e)     {         httppostedfile objfile = asyncupload.postedfile;         if (asyncupload.hasfile)         {             if (!isimagevalid(objfile))                 clientscript.registerclientscriptblock(this.gettype(), "imagenotvalid", "alert('image format wrong. please upload jpeg, png or gif images.')");             else             {                 session["imagedata"] = convert.tobase64string(system.io.file.readallbytes(objfile.filename), 0, system.io.file.readallbytes(objfile.filename).length);                 session["mimetype"] = objfile.contenttype;                 session["imagename"] = asyncupload.filename;                 scriptmanager.registerclientscriptblock(this, this.gettype(), "openpopup", "window.open('imagecroppopup.aspx', 'cropimage', 'height=450,width=700,left=350,top=170,resizable=no,scrollbars=no,toolbar=no,status=no');", true);             }         }         else             clientscript.registerclientscriptblock(this.gettype(), "imagenotuploaded", "alert('please select image.')");     } 

it not hit page_load @ when click of button. please help.

once place asp.net server control button in jquery popup lose click event in main page. have removed button dom @ point. can try hiding server button jquery on main page, replacing server button standard html button click server button .trigger event jquery.

like this:

$("#yourhtmlbuttonid").click(function(){     $("#yourserverbuttonid").trigger("click");   }); 

just remember hide server button jquery , not asp.net's property of visible = false because won't rendered page if do.