ReactNative upload blob data to ASP .NET CORE Web API - react-native

Question

This is my ReactNative code
const changeAvatar = async () => {
// No permissions request is necessary for launching the image library
let result = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ImagePicker.MediaTypeOptions.Images,
allowsEditing: true,
aspect: [4, 3],
quality: 1,
});
if (!result.cancelled) {
const image = await fetchImageFromUri(result.uri);
const uploadUrl = await uploadImage(image);
}
}
const fetchImageFromUri = async (uri) => {
const response = await fetch(uri);
const blob = await response.blob();
return blob;
};
const uploadImage = async (image) => {
var formdata = new FormData();
formdata.append("blob", image, image._data.name);
formdata.append("nameeee", "nameeee");
var requestOptions = {
method: 'POST',
body: formdata,
redirect: 'follow'
};
fetch(global.domain + "/api/profile/avatar", requestOptions)
.then(response => response.text())
.then(result => console.log(result))
.catch(error => console.log('error', error));
}
And this is my ASP .NET Web API code to handle file upload
[Route("avatar")]
[HttpPost]
public async Task<object> Avatar([FromForm] string nameeee, [FromForm] IFormFile blob)
{
return "";
}
I have test my API by using postman to upload a file, it's work great.
But's in my ReactNative code, the file chooser handle convert selected image to blob, so it can't upload to the API. What do i need to modify my ReactNative code to upload selected image to web API ?