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How do I create an application to highlight all the lines containing a search string using EditControl ?

Platform: WinForms |
Control: EditControl |
Published Date: April 30, 2011 |
Last Revised Date: July 10, 2014


You could iterate through every line in the EditControl and highlight each line with the search string as shown in the code below.


searchStr = this.textBox1.Text;

IBackgroundFormat format = this.editControl1.RegisterBackColorFormat(ColorTranslator.FromHtml("#FFBF34"), Color.Transparent);

int currentLine = 0;

for (int i=1; i<=this.editControl1.PhysicalLineCount; i++)


ILexemLine line = this.editControl1.GetLine(i);

foreach (ILexem lexem in line.LineLexems)


if (lexem.Text == searchStr)


if ((i != currentLine) || (i==0))

this.editControl1.SetLineBackColor(i, true, format);

currentLine = i;





searchStr = Me.textBox1.Text

Dim format As IBackgroundFormat = Me.editControl1.RegisterBackColorFormat(ColorTranslator.FromHtml("#FFBF34"), Color.Transparent)

Dim currentLine As Integer = 0

Dim i As Integer

For i = 1 To Me.editControl1.PhysicalLineCount

Dim line As ILexemLine = Me.editControl1.GetLine(i)

Dim lexem As ILexem

For Each lexem In line.LineLexems

If lexem.Text = searchStr Then

If i <> currentLine OrElse i = 0 Then

Me.editControl1.SetLineBackColor(i, True, format)

End If

currentLine = i

End If

Next lexem

Next i

Please refer to the test sample attached below for additional information in this regard.

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