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Merge onupload-list-2629 into production #2636

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Dec 13, 2024
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Merge onupload-list-2629 into production #2636

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33 changes: 26 additions & 7 deletions components/upload/events.md
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Original file line number Diff line number Diff line change
Expand Up @@ -419,13 +419,17 @@ Use the `OnUpload` and [`OnRemove`](#onremove) event handlers to send additional
* [CSRF/XSRF cross-site antiforgery tokens]({%slug upload-kb-validateantiforgerytoken%})
* Any metadata related to the app business logic

To send **cookies** with the upload request, set the [`WithCredentials` component parameter]({%slug upload-overview%}#upload-parameters) to `true`.
To send cookies with the upload request, set the [`WithCredentials` component parameter]({%slug upload-overview%}#upload-parameters) to `true`.

To send a complex object or a collection, serialize it first. Receive it as a `string` argument in the controller method and deserialize it.

>caption Using the OnUpload event to send custom data to the controller

<div class="skip-repl"></div>

````Razor
@using System.Text.Json

<TelerikUpload OnUpload="@OnUploadHandler" />

@code {
Expand All @@ -436,20 +440,30 @@ To send **cookies** with the upload request, set the [`WithCredentials` componen
args.IsCancelled = true;
}

args.RequestData.Add("dataKey", "dataValue"); // for example, user name
args.RequestHeaders.Add("headerKey", "headerValue"); // for example, authentication token
string[] collection = { "foo", "bar", "baz" };

args.RequestHeaders.Add("headerKey", "headerValue"); // for example, token
args.RequestData.Add("dataKey", "dataValue"); // for example, new file name
args.RequestData.Add("collectionKey", JsonSerializer.Serialize(collection));
}
}
````
````Controller
using System.Text.Json;

// Get the custom data and header values from additional method arguments
[HttpPost]
public async Task<IActionResult> Save(IFormFile files, [FromForm] string dataKey, [FromHeader] string headerKey)
public async Task<IActionResult> Save(
IFormFile files,
[FromHeader] string headerKey,
[FromForm] string dataKey,
[FromForm] string collectionKey)
{
// ...

string customData = dataKey;
string customHeader = headerKey;
string customData = dataKey;
string[]? customCollection = JsonSerializer.Deserialize<string[]>(collectionKey);

// ...
}
Expand All @@ -462,8 +476,13 @@ public async Task<IActionResult> Save(IFormFile files)
{
// ...

string customData = Request.Form["dataKey"];
string customHeader = Request.Headers["headerKey"];
string? customHeader = Request.Headers["headerKey"];
string? customData = Request.Form["dataKey"];

if (Request.Form.ContainsKey("collectionKey"))
{
string[]? customCollection = JsonSerializer.Deserialize<string[]>(Request.Form["collectionKey"]!);
}

// ...
}
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