How to Insert Rows to Table Object Inside an Excel Sheet? By Admin

I have difficulties trying to insert rows into an existing table object. Here is my code snippet:

using (OleDbConnection conn = new OleDbConnection(connectionString))
{
    conn.Open();
    OleDbCommand cmd = new OleDbCommand();
    cmd.Connection = conn;

    string insertQuery = String.Format("Insert into [{0}$] (ID, Title,NTV_DB, Type ) values(7959, 8,'e','Type1')", TabDisplayName);
    cmd.CommandText = insertQuery;
    cmd.ExecuteNonQuery();
    cmd = null;
    conn.Close();
}
As a result I get my rows inserted below a ready-made table object:


  •  Open
  •  27-07-2016
  •  4
  •  239

Answers ( 4 )

 Posted on 27-07-2016

Based on here:

ADO.NET cannot access XL's Table objects (aka Lists) nor can it access range names that directly or indirectly reference the table's name or structured references. ADO.NET can access named ranges over tables that reference the table's cell range.
Example: Name MyTable Refers to =$A$1:$E$3. So you can use Range for example (Sheet1$A:E) for this purpose. In this case your Insert statement could change to something like this:

string insertQuery = "INSERT INTO [Sheet1$A:E] (ID, Title,NTV_DB, Type) VALUES (7959,

 Posted on 27-07-2016

If you execute this code:

var contents = new DataTable();
using (OleDbDataAdapter adapter = new OleDbDataAdapter(string.Format("Select * From [{0}$]", TabDisplayName), conn))
{
    adapter.Fill(contents);
}
Console.WriteLine(contents.Rows.Count);//7938
you will see 7938 (last row number on your screenshot). And when you insert new row, it inserted at 7939 position. Empty content in (7929, 7930, ...) rows are ignored, because excel knows that last number is 7938.

Solutions:

You must delete all rows after 7928 in excel file.
You must insert on specific position

 Posted on 27-07-2016

If you are using the Microsoft.ACE.OLEDB provider, then be aware that it doesn't support a named range. You need to provide the name of the sheet [Sheet1$] or the name of the sheet followed by the range [Sheet1$A1:P7928]. If the range is not provided, it will then define the table as the used range, which may contains empty rows.

One way to deal with empty rows would be to delete them, but the driver doesn't support the DELETE operation.

Another way is to first count the number of rows with a non empty Id and then use the result to define the range of the table for the INSERT statement:

using (OleDbConnection conn = new OleDbConnection(connectionString)) {
    conn.Open();

    string SheetName = "Sheet1";
    string TableRange = "A1:P{0}";

    // count the number of non empty rows
    using (var cmd1 = new OleDbCommand(null, conn)) {
        cmd1.CommandText = String.Format(
          "SELECT COUNT(*) FROM [{0}$] WHERE ID IS NOT NULL;"
          , SheetName);

        TableRange = string.Format(TableRange, (int)cmd1.ExecuteScalar() + 1);
    }

    // insert a new record
 

 Posted on 27-07-2016

I'm not sure Access C# works the same as Excel, but this worked on a spreadsheet for me. Maybe it could help you?

Table3.ListRows[1].Range.Insert(Excel.XlInsertShiftDirection.xlShiftDown);