Programming Tutorials

Rename uploaded file FileUpload is an asp.net web server control that allows users to upload a file to a web server from their local computer. FileUpload server control displays a text box and a browse button on the web browser to select a file to upload from the client's local machine. FileUpload control does not automatically save the uploaded file to the web server. FileUpload SaveAs() method allows us to save the contents of a client-uploaded file to a web server hard disk in a specified path. Using the FileUpload control's HasFile property we can verify that the FileUpload control contains a file. FileUpload control's FileName property gets the client-uploaded file name. FileUpload control's PostedFile property allows us to get the additional properties on the uploaded file such as FileName, ContentLength, ContentType, etc. We can change the client-uploaded default file name by using FileUpload control's SaveAs m...

FileUpload control validation FileUpload is an ASP.NET web server control that allows us to upload a file to the web server from the client browser. FileUpload server control renders a TextBox and a browse Button in the web browser that enable users to select a file from the client computer and upload it to the web server machine. Users can specify the file to upload by entering the full path of the local computer file in the TextBox of FileUpload control or using the browse button to select a file from the local computer file system. RequiredFieldValidator control allows us to check whether the FileUpload control has a file selected. So users must input a file path in FileUpload control before submitting the form. We can make the FileUpload control a required field in web form by attaching a RequiredFieldValidator control with it. RequiredFiledValidator is an asp.net validation web server control that makes an input control to a require...

Upload file with specific extension FileUpload is an asp.net web server control that allows users to upload a file to a web server from their local computer file system. FileUpload control does not save files automatically to the server. FileUpload control's SaveAs() method allows us to save client-uploaded files to the web server file system. SaveAs() method needs to pass a parameter named 'filename'. By default, FileUpload control uploads any valid type file from the client machine. Sometimes .net developers need to restrict file type to upload. Such as in an application we can allow users to upload only JPEJ image files. Next, paragraphs describe how can we filter extensions when uploading a file to a web server. First, we specify the web server folder to save the uploaded file. Second, we check the FileUpload control contains a file by FileUpload HasFile property. This method validates FileUpload control in server-side code...

FileUpload Web Server Control FileUpload is an ASP.NET web server control that allows users to send (upload) a file from their computer to the server. Uploaded file submitted to the server as part of the Web Browser request during PostBack. The user only can upload files whose size is below the maximum allowed file size. The .NET developers can set the uploaded file's maximum size by setting the MaximumRequestLength configuration value. We can test the FileUpload control's HasFile property to check whether the FileUpload control has an uploaded file. Page developers also can control the uploaded files MIME type and extension. Developers can only accept the specific MIME types files and those files which have the specific extension. The PostedFile property gets the underlying HttpPostedFile object for the uploaded file. Using FileUpload control's PostedFile property we can access additional properties on the uploaded file. We can get ...