How to create a File Upload with File Validation in Asp.net MVC / How to Use the @Html.TextBoxFor() for File Upload ?

While Wonder how to validate the Upload control in a easy way, I find this solution as the best to do it, although lot of other ways are found.This is because you need not need to write much more code as a normal razor validation will solve the problem.


My View:


 <div id="dvUpload" class="hide fieldControlContainer">
                <div class="innerDivLeft">
                    <label class="blue">Upload Document:</label>
                </div>
                <div class="innerDivRight">
                      @Html.TextBoxFor(model => model.File, new { @class = "inputTextBox", type="file" })
                      @Html.ValidationMessageFor(model => model.File)
                </div>
 </div>

The magic lies with this line  @Html.TextBoxFor(model => model.File, new { @class = "inputTextBox", type="file" }), here it will be rendered as a file upload control rather than a text because we are over riding the default behavior of input tag rendering by specifying it as type="file".

My Controller:



 public ActionResult Index(HttpPostedFileBase file, MyModel model)
        {
                  //Codes written here.
        }


MyModel:

public class MyModel
{

       [Required(ErrorMessage = "Please select file")]     // this is for model validation
        public HttpPostedFileBase File { get; set; }

}

Now your file upload validation will be checked like any other normal control.