在 winform 上突出显示字符串之间的差异

Question

I am hoping somebody can help me out here and that this questions won't be too vague.

I am trying to determine a way that I can highlight the differences between two text strings within a winform.

I have the original string in one column of a data grid and the string to compare to in a second column. What I would like is to highlight where the comparison string is different within the data grid view itself.

Example:

Thanks for the hep

Thanks for the help!!

where the l , and two ! would be highlighted

I have tried the following (Shout out to Bouam for his help in this Previous Post ):

for (int i = 0; i < TextProcessingResults.RowCount; i++)
{
    if (TextProcessingResults.Rows[i].Cells[1].Value != null)
    {
        if ((string)TextProcessingResults.Rows[i].Cells[1].Value != (string)TextProcessingResults.Rows[i].Cells[2].Value)
        {
            TextProcessingResults.Rows[i].DefaultCellStyle.ForeColor = Color.Red;
        }
    }
}

But this only highlights which rows are different not at the character level. I'm new to all of this, so is this a crazy endeavor to undertake?

Could anybody help or point me towards a resource that would be useful?

Answer 1

You can create a new DatGridViewColumn based on RichTextBox and then use your new rich text column, to highlight differences in rich text.

This may help you:

• RichTextBox Cell in a DataGridView

And here is an ouptput based on this:

You can apply the algorithm you need to compare strings for differences to columns and using this DataGridViewRichTextBoxColumn highlight the differences.

To learn more about creating custom datagridview column types you can take a look atBuild a Custom NumericUpDown Cell and Column for the DataGridView Control .