Can Page_Load() Be Async

Can a Page_Load() method be async? I ask as if I have declared as such

protected void Page_Load()

Everything loads as it should. If I have it declared as such
protected async void Page_Load()

the Page_Load() breakpoint is not hit, nor does the catch() block get hit.

Now I am trying to set my Page_Load() method as async in order to have 3 different stored procedures execute to completion before the page is fully rendered. If I do not have my Page_Load() method as async I get this compile error:

The await operator can only be used with an async method.

My code is as such.

private DataSet ds1 = new DataSet();
private DataSet ds2 = new DataSet();
private DataSet ds3 = new DataSet();

protected async void Page_Load(object sender, EventArgs e)
{
 if (!IsPostBack)
 {
    var task1 = GetStoreInfo();
    var task2 = GetSalespersonInfo();
    var task3 = GetManagerInfo();
    await System.Threading.Tasks.Task.WhenAll(task1, task2, task3);
    PopulateAll();
 }

}
async System.Threading.Tasks.Task<DataSet> GetStoreInfo()
{
  ds1 = RunStoredProcedureToReturnThisData();
  return ds1;
}

async System.Threading.Tasks.Task<DataSet> GetSalespersonInfo()
{
  ds2 = RunStoredProcedureToReturnThisData();
  return ds2;
}

async System.Threading.Tasks.Task<DataSet> GetManagerInfo()
{
  ds3 = RunStoredProcedureToReturnThisData();
  return ds3;
}

protected void PopulateAll()
{
  //Bind the different returned datasets
}

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

Scott Hanselman has the magic to use async with ASP.NET lifecycle events here

http://www.hanselman.com/blog/TheMagicOfUsingAsynchronousMethodsInASPNET45PlusAnImportantGotcha.aspx

Method 2

No the ASP.NET design dose not call this method using any form of Task Await, so it cannot be Asnyc


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

0 0 votes
Article Rating
Subscribe
Notify of
guest

0 Comments
Inline Feedbacks
View all comments
0
Would love your thoughts, please comment.x
()
x