Wait for Workbook.RefreshAll() (C#)

Question

I want to loop through a directory (using C#) and Refresh all Excel sheets in there. I use:

Workbook.RefreshAll();

How can I wait for the <

Answer 1

If you go through your Workbook and set the the BackgroundQuery property of all of your QueryTables to false, RefreshAll should finish before moving on.

foreach (Worksheet worksheet in workbook.Worksheets)
{
    foreach (QueryTable table in worksheet.QueryTables)
        table.BackgroundQuery = false;
}

//This will finish executing before moving on
workbook.RefreshAll();

Answer 2

Maybe you can query for the State:

Application.CalculationState =xldone

For Documentation look here: http://msdn.microsoft.com/en-us/library/office/bb220901(v=office.12).aspx

Answer 3

Updated 31.05.2016...

Thanks for your help. I found the following solution:

foreach (MSExcel.WorkbookConnection cnn in wb.Connections)
{
    if (cnn.Type.ToString() == "xlConnectionTypeODBC")
    {
        cnn.ODBCConnection.BackgroundQuery = false;
    }
    else
    {
        cnn.OLEDBConnection.BackgroundQuery = false;
    }
}

Frank

Answer 4

The below code will work perfectly when your excel has to run background query to pull data from SQL Server/MS Access and it will wait for the query is successful.

public void RefreshSheet(Excel.Application Excel, Excel.Workbook WB)
{
    WB.RefreshAll();
    Excel.Application.CalculateUntilAsyncQueriesDone();
    WB.save();
}

Here WB is the workbook and Excel is the Excel Application declared in your code.