Download ASP.NET MVC 2 cookbook : over 70 clear and incredibly by Andrew Siemer; Richard Kimber PDF

By Andrew Siemer; Richard Kimber

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The nice thing is that a good chunk of the code was guard code to ensure that items, as well as code to determine the content type of the image to load, existed. Pretty much all of the code is there to allow us to provide added functionality. Notice that there isn't any code to beat the framework into submission. 51 Download from Wow! com> Taking Action in Your Controllers There's more... There are many ways to implement this. Some examples will have many overloads to handle processing memory streams directly or via byte arrays.

Cs: // can we zoom this image? Width; } } 9. Now we are going to make sure that we don't distort our image by setting the width and zoom to whatever was entered. Instead, we are going to maintain the aspect ratio of the image that we are working with. This means that if we have a square original image, we won't allow the request to turn it into a rectangle there by distorting the image. Height * _width / fullsizeImage. Height; newHeight = _maximumHeight; } 10. Now that we have all the information we need, we can create a new instance of Image by using another helper method—GetThumbnailImage.

We can do this (in this case) with the handy-dandy GenerateRandomCode method that will give us a random number. You can tweak it to do as you like. Then we will stuff that code into a session variable for comparison later. Add("captcha", captchaText); return new CaptchaResult(captchaText); } 7. Now that we have our CaptchaResult wired up as an action, we can call directly and wire up our view. Open the "Index" view for the HomeController. We first need to add a form to our view. Then we will add an image that loads the GetCaptcha method.

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