Friends, I found the solution by myself. The problem were in the MyService. I have injected the service in my class in wrong way.
I need to study more of Blazor, I think.
Best regards to all.
Igor.
Hi guys,
I'm new here so hello to everybody!
In my Blazor project, I have implemented the above method to update database in a component (.razor) . It read a .txt file, and in a foreach loop it call a post web API to save data in the database:
private async Task updateDatabaseAsync()
{
try
{
[ ... code ... ]
// Update Database (post API)
//
int intTotal = 11;
List<string> lstMyList = File.ReadLines(strPathNameText).Reverse().Take(intTotal).Reverse().ToList();
//
string sep = "\t";
foreach (string txtMyDataInList in lstMyList)
{
MyData newData = new MyData();
//
newData.TypeData01 = txtMyDataInList.Split(separator: sep.ToCharArray())[0];
newData.TypeData01 = txtMyDataInList.Split(separator: sep.ToCharArray())[1];
newData.TypeData01 = txtMyDataInList.Split(separator: sep.ToCharArray())[2];
//
await MyService.PostUpdateDatabase(newData);
}
}
catch (Exception ex)
{
var errorMessage = ex.Message;
throw;
}
}
The method works fine. The problem started when I have moved this method inside a generic class, in order to use it in different parts of my code.
Inside the generic class the method doesn't works! This is the same method, I haven't changed nothing, but in the line were the web api is colled I receive an error: "object reference not set to an instance of an object".
I have changed the method in different way, instead of the foreach loop. I have used the "Task.WhenAll(tasks);", or Parallel, but nothing I receive the same error.
Any idea to understand where the problem is? Thanks in advance for every kind of help.
Igor.
Friends, I found the solution by myself. The problem were in the MyService. I have injected the service in my class in wrong way.
I need to study more of Blazor, I think.
Best regards to all.
Igor.