c# - Parameter is not valid while try to save image -


i have method in fileutility class save images.

public static void saveimage(system.io.stream file, string savepath, size size, bool enforceratio, bool testreverse = false)     {         var image = image.fromstream(file);         var imageencoders = imagecodecinfo.getimageencoders();         int enc = path.getextension(savepath).tolower().contains("png") ? 4 : 1;         encoderparameters encoderparameters = new encoderparameters(1);         encoderparameters.param[0] = new encoderparameter(system.drawing.imaging.encoder.quality, 90l);          size s = new size(size.width, size.height);         if (testreverse)         {             if (image.width <= image.height)             {                 if (size.width <= size.height)                 {                     s.width = size.width;                     s.height = size.height;                 }                 else                 {                     s.width = size.height;                     s.height = size.width;                 }             }             else             {                 if (size.width <= size.height)                 {                     s.width = size.height;                     s.height = size.width;                 }                 else                 {                     s.width = size.width;                     s.height = size.height;                 }             }         }          var canvaswidth = s.width;         var canvasheight = s.height;         var newimagewidth = s.width;         var newimageheight = s.height;         var xposition = 0;         var yposition = 0;         if (enforceratio)         {             var ratiox = s.width / (double)image.width;             var ratioy = s.height / (double)image.height;             var ratio = ratiox < ratioy ? ratiox : ratioy;             newimageheight = (int)(image.height * ratio);             newimagewidth = (int)(image.width * ratio);         }          var thumbnail = new bitmap(canvaswidth, canvasheight);         var graphic = graphics.fromimage(thumbnail);          if (enforceratio)         {             graphic.clear(color.white);         }          graphic.interpolationmode = interpolationmode.highqualitybicubic;         graphic.smoothingmode = smoothingmode.highquality;         graphic.pixeloffsetmode = pixeloffsetmode.highquality;         graphic.compositingquality = compositingquality.highquality;         graphic.drawimage(image, xposition, yposition, newimagewidth, newimageheight);          thumbnail.save(savepath, imageencoders[enc], encoderparameters);     }

it work well. images files (not every file)

argument exception : parameter not valid

in first line var image = image.fromstream(file);

i call method this:

fileutility.saveimage(add2.iconsquare.inputstream, server.mappath(program.iconsquare), new system.drawing.size { width = 250, height = 250 }, false);

that add2.iconsquare httppostedfilebase

public httppostedfilebase iconsquare { get; set; }

the thing add2 come action tempdata.

var add2 = tempdata["create_step2"] addstep2;

i mean take files user in action create_step2 , save them in tempdata try save them in action create_step3. can tell me doing wrong?


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