C#FlowDocument单元格宽度问题

我在为添加到流程文档的每一行调整单元格大小时遇到问题。我想手动设置流程文档单元格的宽度。此代码取自并修改自微软的示例

代码：

internal static FlowDocument GetPicklistFlowDoc()
    {
        DataTable daTable = new DataTable();
        using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["PicklistConnection"].ConnectionString))
        using (var cmd = new SqlCommand("GetCurrentPicklistItems", con))
        using (var da = new SqlDataAdapter(cmd))
        {
            cmd.CommandType = CommandType.StoredProcedure;
            da.Fill(daTable);
        }
        FlowDocument flowDoc = new FlowDocument();
        flowDoc.IsColumnWidthFlexible = true;
        // Create the Table...
        Table table1 = new Table();
        // ...and add it to the FlowDocument Blocks collection.
        flowDoc.Blocks.Add(table1);

        // Set some global formatting properties for the table.
        //table1.CellSpacing = 15;
        //table1.Background = Brushes.White;
        int numberOfColumns = 6;
        // Create and add an empty TableRowGroup to hold the table's Rows.
        table1.RowGroups.Add(new TableRowGroup());
        // Add the first (title) row.
        table1.RowGroups[0].Rows.Add(new TableRow());
        // Alias the current working row for easy reference.
        TableRow currentRow = table1.RowGroups[0].Rows[0];
        // formatting for the title row.
        currentRow.Background = Brushes.Silver;
        currentRow.FontSize = 24;
        currentRow.FontWeight = System.Windows.FontWeights.Bold;
        // Add the header row with content, 
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Picklist" + DateTime.Now.ToString()))));
        // and set the row to span all 6 columns.
        currentRow.Cells[0].ColumnSpan = 6;
        // Add (header) row.
        table1.RowGroups[0].Rows.Add(new TableRow());
        currentRow = table1.RowGroups[0].Rows[1];
        // formatting for the header row.
        currentRow.FontSize = 18;
        currentRow.FontWeight = FontWeights.Bold;

        // Add cells with content to the second row.
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Code"))));
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Qty"))));
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Location"))));
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Last 1"))));
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Issue"))));
        currentRow.Cells.Add(new TableCell(new Paragraph(new Run("Store"))));
        currentRow.Cells[0].ColumnSpan = numberOfColumns;
        //currentRow.Cells[0].BorderThickness = new Thickness(0, 0, 0, 1);
        //currentRow.Cells[0].BorderBrush = Brushes.Black;
        // Add the another row. and formatting
        table1.RowGroups[0].Rows.Add(new TableRow());
        currentRow = table1.RowGroups[0].Rows[2];                
        currentRow.FontSize = 14;
        currentRow.FontWeight = FontWeights.Normal;
        currentRow.FontFamily = new FontFamily("Arial");
        int z = 3;
        foreach (DataRow dataRow in daTable.Rows)
        {
            double quantity = (double)dataRow[1];
            string location = dataRow[3].ToString();

                if (quantity > 1)
                {
                    currentRow.Background = Brushes.Silver;
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[0].ToString()))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[1].ToString()))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(location))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(""))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(""))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[2].ToString()))));
                    currentRow.Cells[0].ColumnSpan = numberOfColumns;
                    for (int i = 0; i <= numberOfColumns - 1; i++)
                    {
                        currentRow.Cells[i].BorderThickness = new Thickness(1, 1, 1, 1);
                        currentRow.Cells[i].BorderBrush = Brushes.Black;
                    }

                }
                else
                {
                    //currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[0].ToString()))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[0].ToString()))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[1].ToString()))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[3].ToString()))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(""))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(""))));
                    currentRow.Cells.Add(new TableCell(new Paragraph(new Run(dataRow[2].ToString()))));
                    currentRow.Cells[0].ColumnSpan = numberOfColumns;
                    for (int i = 0; i <= numberOfColumns - 1; i++)
                    {
                        currentRow.Cells[i].BorderThickness = new Thickness(1, 1, 1, 1);
                        currentRow.Cells[i].BorderBrush = Brushes.Black;
                    }
                }
            table1.RowGroups[0].Rows.Add(new TableRow());
            currentRow = table1.RowGroups[0].Rows[z];
            location = "";
            z++;
        }

        z = 3;

        return flowDoc;
    }

我想手动设置单元格宽度属性或将其设置为autoWidth。

 GridLengthConverter glc = new GridLengthConverter();
 table.Columns[0].Width = (GridLength)glc.ConvertFromString("300");
 table.Columns[1].Width = (GridLength)glc.ConvertFromString("50");
 table.Columns[2].Width = (GridLength)glc.ConvertFromString("50");