Cannot send MemoryStream to server via PostAsync request

[Eric]

As this question is not exclusive to syncfusion, not sure you will waste your time answering, but here it goes => How can I send a MemoryStream created on the client side to the server side?

I am able to create and download (SaveAs) a powerpoint presentation at the client side with no issues, or create and send via email the presentation on the server side. What I want to do is be able to create the presentation and send the Stream to the server side so I just need to attach it to the email and send it.

I have tried PostAsync and PostJsonAsync (with multiple variations) to no avail. Any help would be appreciated.

Best,

Eric

[Prem Kumar Madhan Raj]

Hi Eric, 

 

Thanks for contacting Syncfusion support. 

 

We have analyzed with your query to send the memory stream from client side to the server side controller method at our end. Unfortunately, we can’t post the memory stream directly from the client end to the server controller. However, we can convert the memory stream to a base 64 string and post it from the client to the server controller method and then convert the obtained base 64 string obtained in the server controller method into memory stream to achieve your requirement. As shown in the below code snippet. 

 

[Index.razor] 

 

//Converting a memory stream to base 64 string 

string baseString = Convert.ToBase64String(stream.ToArray()); 

//Send the base 64 text 

await Http.SendJsonAsync(HttpMethod.Post, "/api/Sample/Sample", new PostValue { value = baseString }); 

 

 

[sampleController] (server side controller) 

 

[HttpPost("[Action]")] 

        public void Sample([FromBody] PostValue value) 

        { 

            //converting the base 64 string back to memory stream 

            MemoryStream sample = new MemoryStream(Convert.FromBase64String(value.value)); 

            //saving the file locally in the machine from the memory stream 

            FileStream fs; 

            using (fs = new FileStream("output.pdf", FileMode.OpenOrCreate)) 

            { 

                sample.CopyTo(fs); 

            } 

        } 

 

 

For your convenience, we have attached the sample to achieve your requirement as explained above in the below link. Please check it. 

 

Sample: https://www.syncfusion.com/downloads/support/forum/147807/ze/Sample_CallMethod972205338  

 

Here, in the sample, we have converted a simple pdf file memory stream (been created dynamically) to a base 64 string at the client end and converted the same base 64 string to a memory stream obtained in the server controller method and saved pdf file in the (Server directory) as output.pdf . Please let us know if you need any further assistance. 

 

Regards, 

 

Prem Kumar M 

[Eric]

Thank you so much, this is exactly what I wanted! Even passing as part of an object, which I had not mentioned, is here. I really appreciate your help! :)

[Prem Kumar Madhan Raj]

Hi Eric, 

 

Thanks for the update. We are happy to hear that the provided solution met your requirement. Please let us know if you need any further assistance.

Regards, 

 

Prem Kumar M