CODEWITHSUNDEEP
c#winformsweb-servicesasmx
Moons
Moons

Reputation: 3854

Upload a File using a Windows Forms to a ASP.NET Web Service (ASMX)

I want to upload a file using windows application to a web service so that web service can process the file.

Please tell me how can i achieve this.

I only know that i can use web service with windows forms to send only string, int, these types. But what about file.

Any help is appreciated

Upvotes: 2

Views: 3106

Answers (2)

Will Wu
Will Wu

Reputation: 631

If use WebService, it is general that we define a certain webmethod which takes a byte array param and a string param such as

public void UploadFile(bytes as Byte(), filename as String)

And then, we can easily call it in .NET application since we can use the WSDL.EXE or the VS.NET to generate a easytouse client proxy class.

Link to reference

Upvotes: 2

Vamsi
Vamsi

Reputation: 4253

As Will Wu said you can always declare a web method that takes a byte[] as input in your web service, but if you don't like to send the byte array as it is in your web service call, you can always encode the byte[] to a base64 string from your client and decode the byte[] on the server side

Example

WebService sample web Method

    [WebMethod]
    public bool UploadFile(string fileName, string uploadFileAsBase64String)
    {
        try
        {
            byte[] fileContent = Convert.FromBase64String(uploadFileAsBase64String);

            string filePath = "UploadedFiles\\" + fileName;
            System.IO.File.WriteAllBytes(filePath, fileContent);
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

Client Side Base64 string generation

    public string ConvertFileToBase64String(string fileName)
    {
        byte[] fileContent = System.IO.File.ReadAllBytes(fileName);
        return Convert.ToBase64String(fileContent);
    }

use the above method to convert your file to a string and send it to the web service as a string instead of byte array

Upvotes: 1

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