Tables not merging correctly when multiple columns are involved

I have a word document that has a bunch of tables on it. When I try to merge all of the tables into one table the columns become all mismatched, like so:

This is the code I am using to merge the tables:

public void MergeTables(ref Document document)
{
    NodeCollection tables = document.GetChildNodes(NodeType.Table, true);

    Table mergeTable = null;
    
    foreach (Table table in tables)
    {
        if (table.FirstRow.RowFormat.HeadingFormat)
        {
            mergeTable = table;
        }
        else if (mergeTable != null)
        {
            bool morerows = true;

            while (morerows)
            {
                foreach (Row row in table.Rows)
                {
                    mergeTable.Rows.Add(row);
                }

                if(table.Rows.Count == 0)
                {
                    morerows = false;
                }
            }                   

            table.Remove();
        }                
    }
}

Any help will be greatly appreciated.

@fileboundintegrations

It seems that you are experiencing issues with merging multiple tables in a Word document, resulting in mismatched columns. This can happen when the tables have different structures or when the rows being merged do not align properly.

To effectively merge tables in Aspose.Words, you can follow these steps:

  1. Ensure Consistent Column Structure: Before merging, make sure that the tables you are merging have the same number of columns. If they differ, you may need to adjust the tables by adding or removing columns to match their structures.

  2. Use the Correct Merging Logic: The code you provided attempts to merge tables by adding rows from one table to another. However, it may not handle cases where the tables have different column counts. Here’s a refined approach to ensure that rows are added correctly:

public void MergeTables(ref Document document)
{
    NodeCollection tables = document.GetChildNodes(NodeType.Table, true);
    Table mergeTable = null;

    foreach (Table table in tables)
    {
        if (table.FirstRow.RowFormat.HeadingFormat)
        {
            mergeTable = table;
        }
        else if (mergeTable != null)
        {
            foreach (Row row in table.Rows)
            {
                // Ensure the row has the same number of cells as the mergeTable
                if (row.Cells.Count == mergeTable.FirstRow.Cells.Count)
                {
                    mergeTable.Rows.Add(row.Clone(true)); // Clone the row to avoid removing it from the original table
                }
            }
            table.Remove(); // Remove the table after merging
        }
    }
}
  1. Cloning Rows: When adding rows from one table to another, use the Clone method to ensure that the original rows are not removed from their source table until you are done with the merging process.

  2. Handling Different Cell Counts: If the tables have different cell counts, you may need to implement additional logic to handle this, such as filling in empty cells or adjusting the layout.

  3. Testing and Debugging: After implementing the merging logic, test with various table configurations to ensure that the merging works as expected without misalignment.

By following these guidelines, you should be able to merge your tables more effectively without encountering mismatched columns. If you continue to face issues, consider checking the specific configurations of the tables you are working with.

For more detailed examples and best practices, you can refer to the Aspose documentation on working with tables here.

Sources:
[1]: Merge Table Cells in C#|Aspose.Words for .NET
[2]: Work with Columns and Rows in C#|Aspose.Words for .NET

@fileboundintegrations Rows in MS Word tables are completely independent and can contain any number of cells of any width. So when rows from one table are added to another table there might be columns mismatch. This might occur because cells in the row has different width, for example. Could you please attach your problematic input and output documents here for testing? We will check the issue and provide you more information.

Sorry it has taken me so long to reply to your quick responses. I have changed my merging code to what you suggested and that didn’t solve the problem on it’s own.

I started to rebuild the document table by table to find out where exactly it stopped working and I found that when I was merging the 4 columns into 3 it wouldn’t look right.

After further testing, I have found that if I remove everything in the footer. All my tables merge properly without any crazy column checks. If I try to have just the page number in the footer, my tables don’t merge correctly.

Any ideas?

Here are some screen shot as examples of the final document:

With footer:

Without footer:

@fileboundintegrations Could you please attach the problematic document here for testing? We will check the issue and provide you more information. Unfortunately, screenshots does not give enough information for analysis.

Sure. Here is the document I am using.

Test doc.docx (175.5 KB)

Let me know if you have any questions about the document. Thanks for your help.

@fileboundintegrations Thank you for additional information. The provided document is quite large and contains plenty of tags, which I suppose are processed by your system. Could you please simplify the document and provide simple code, which we can run on the document to reproduce the problem?