IE10 sending image button click coordinates with decimals (floating point values) causing a ParseInt32 FormatException

Question

It seems like ASP.NET 4.0 is not prepared to handle ImageButton events triggered by Internet Explorer 10. The problem is that IE10 sends the image click coordinates as doubl

Answer 1

Here's a JavaScript workaround. It overrides the existing method, floors the x and y coordinates then calls the existing method with these new coordinates.

Sys.WebForms.PageRequestManager.getInstance()._origOnFormActiveElement = Sys.WebForms.PageRequestManager.getInstance()._onFormElementActive;
Sys.WebForms.PageRequestManager.getInstance()._onFormElementActive = function(element, offsetX, offsetY){
    if (element.tagName.toUpperCase() === 'INPUT' && element.type === 'image'){
        offsetX = Math.floor(offsetX);
        offsetY = Math.floor(offsetY);
    }
    this._origOnFormActiveElement(element, offsetX, offsetY);
};