Asp.net Upload File Hasfile Always False
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Asp.net - returns - fileupload postedfile is null in asp net. FileUpload.hasFile is always False (5). Turn out that FileUpload.HasFile is also false if you upload an empty file. In this case adding some text to the file you want to upload will make the Hasfile property return true.
Definition
Gets a value indicating whether the FileUpload control contains a file.
Property Value
true if the FileUpload contains a file; otherwise, false.
- Attributes
Examples
The following example demonstrates how to create a FileUpload control that performs error checking. Before saving the file, the HasFile method is called to verify that the control contains a file to upload. In addition, the File.Exists method is called to check whether a file with the same name already occurs in the path. If it does, the name of the file to upload is prefixed with an underscore character before the SaveAs method is called. This prevents the existing file from being overwritten.
Remarks
The HasFile property gets a value indicating whether the FileUpload control contains a file to upload. Use this property to verify that a file to upload exists before performing operations on the file. For example, before calling the SaveAs method to save the file to disk, use the HasFile property to verify that the file exists. If HasFile returns true, call the SaveAs method. If it returns falseRfactor f1 rmt 2013 2017. , display a message to the user indicating that the control does not contain a file.
Applies to
See also
This example shows how to use FileUpload Control In UpdatePanel Using Asp.Net Ajax when FileUpload.HasFile method returns false inside Update Panel.If you are uploading files with FileUpload Inside Ajax UpdatePanel, Upload fails because few controls doesn't work with Ajax Partial postbacks.
To make full page postback for uploads to work we need to define PostBackTrigger for upload button outside ContentTemplate in html source.
HTML SOURCE
Now we can write code in Click Event of Button to Upload Files With FileUpload Control In UpdatePanel.
