argumentexception - w3toppers.com

“Parameter not valid” exception loading System.Drawing.Image

I had the same problem and apparently is solved now, despite this and some other gdi+ exceptions are very misleading, I found that actually the problem was that the parameter being sent to a Bitmap constructor was not valid. I have this code: using (System.IO.FileStream fs = new System.IO.FileStream(inputImage, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite)) { try { using … Read more

Invalid postback or callback argument. Event validation is enabled using ”

Do you have code in your Page_Load events? if yes, then perhaps adding the following will help. if (!Page.IsPostBack) { //do something } This error is thrown when you click on your command and the Page_load is being ran again, in a normal life cycle it would be Page_Load -> Click on Command -> Page_Load … Read more