Databases
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PO
 

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  1. PO
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    <p>When using the Office InterOp services, you must close the objects you've created in reverse order.</p> <pre><code>private static void Excel_FromDataTable(DataTable dt) { // Global missing variable. object missing = System.Reflection.Missing.Value; // Creates an excel object, Excel.Application excel = new Microsoft.Office.Interop.Excel.Application(); // Then a workbooks object, Excel.Workbooks workbooks = excel.Workbooks; // Then adds a workbook object, Excel.Workbook workbook = workbooks.Add(true); // Then adds a worksheet object, Excel.Worksheet activeSheet = workbook.ActiveSheet; // Then names the worksheet to what we need. activeSheet.Name = "scbyext"; // Add column headings, int iCol = 0; // for each row of data, int iRow = 0; foreach (DataRow r in dt.Rows) { iRow++; // Then add each row's cell data. iCol = 0; foreach (DataColumn c in dt.Columns) { iCol++; excel.Cells[iRow, iCol] = r[c.ColumnName]; } } // Disable Excel prompts. excel.DisplayAlerts = false; // Save the workbook to the correct folder. workbook.SaveAs("C:\\Escaped\\Path", Excel.XlFileFormat.xlExcel8, missing, missing, false, false, Excel.XlSaveAsAccessMode.xlNoChange, missing, missing, missing, missing, missing); // Release the objects we made, in reverse order, to allow Excel to quit correctly. ReleaseObj(activeSheet); ReleaseObj(workbook); ReleaseObj(workbooks); excel.Quit(); ReleaseObj(excel); } </code></pre> <p>If you don't, the process will stay stuck open. I'm not sure what it's doing when it stays stuck, but by the end of the day the CPU Time used by it can get quite high.</p>
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    1. POWhen Excel file is opened externally during C# application, an exception occurs
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    1. This table or related slice is empty.
    1. USL. Miller
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    1. COThis doesn't answer the actual query of the OP :)
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      1. USSiddharth Rout
    2. COThe basic advice is good, because leaving Excel open increases the risk of an interactive use of the same instance, but this implementation is incomplete: doesn't release the `excel.Cells` objects it creates, and doesn't use try/finally to guarantee release in the event of an exception.
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      1. USJoe
 

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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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