C # Add a search image to RichTextBox

 

Code

Code
/*
-- Organizer: Eternal de shadow

-- Sorting time: 2010/06/08

-- Content: C # how to add a search image to RichTextBox:
*/

//★★★★★★★★★Case Analysis:★★★★★★★★★★★★★★★★★★★★★★★★★★★
// Environment: C #
// 1 I Have A RichTextBox Control with a lot of content. I want to press the button (CTRL + F) to bring up a search screen.
// 2 in the search screen, I enter a value to search for the content in RichTextBox on the parent page.
// 3 pairs of searched content are marked with special colors

//★★★★★★★★★Implementation Method:★★★★★★★★★★★★★★★★★★★★★★★★★★★
// Step 1: add the code in the richtextbox1_keydown event:
If (E. Control & E. keycode = keys. f)
{
// Select the content of all RichTextBox
This. richtextbox1.selectall ();

// Change the selected font color of RichTextBox
This. richtextbox1.selectioncolor = color. Black;

// Change the background color of the selected font of RichTextBox
This. richtextbox1.selectionbackcolor = color. moccasin;

// Select the 0 characters starting from 0 in RichTextBox
This. richtextbox1.select (0, 0 );

// Roll back the scroll bar to the focus position
This. richtextbox1.scrolltocaret ();

// The search screen is displayed.
Frmlookfor FRM = new frmlookfor ();
FRM. Show (this );
}

// Step 2: Find the image

// Variable definition and Object Instantiation
Public static string strkey = "";
Private int Index = 0;
Private int K = 1;

Strkey = This. textbox1.text;

If (strkey = "")
{
Return;
}

// Initial Stages
Frmrulerchk frm1 = (frmrulerchk) This. owner; // to get the main form in the child form

// Specify the merge character column.
Int M = system. text. regularexpressions. regEx. matches (RichTextBox) frm1.controls ["richtextbox1"]). text, strkey, system. text. regularexpressions. regexoptions. ignorecase ). count;

If (RichTextBox) frm1.controls ["richtextbox1"]). Text! = "")
{
If (k <= m)
{
While (Index = (RichTextBox) frm1.controls ["richtextbox1"]). Find (strkey, index, richtextboxfinds. None)> = 0)
{
// Select colors for text Columns
(RichTextBox) frm1.controls ["richtextbox1"]). selectioncolor = color. Red;

// Select し text column の backcolor
(RichTextBox) frm1.controls ["richtextbox1"]). selectionbackcolor = color. blue;

// Initiate a temporary migration task
(RichTextBox) frm1.controls ["richtextbox1"]). Focus ();

// Select a text Column
(RichTextBox) frm1.controls ["richtextbox1"]). Select (index, 5 );

// Please wait until there is no manual operation
(RichTextBox) frm1.controls ["richtextbox1"]). scrolltocaret ();
Index ++;
K ++;

If (k = m)
{
MessageBox. Show ("the start position of the zookeeper is zookeeper without authorization", "NOTE", messageboxbuttons. OK, messageboxicon. information );
Index = 0;
K = 1;
}

Return;
}
}
}

//★★If you want to display only one query screen and minimize the status to normal:★★★★★★★★
// Change the code in step 1:

// Instantiate the form to be opened
Public static frmlookfor frmlook = NULL;

If (E. Control & E. keycode = keys. f)
{
If (frmrulerchk. frmlook = NULL)
{
This. richtextbox1.selectall ();

This. richtextbox1.selectioncolor = color. Black;
This. richtextbox1.selectionbackcolor = color. moccasin;
This. richtextbox1.select (0, 0 );
This. richtextbox1.scrolltocaret ();
Frmrulerchk. frmlook = new frmlookfor ();
Frmrulerchk. frmlook. Show (this );
}
Else
{
Try
{
If (frmrulerchk. frmlook. windowstate = formwindowstate. Minimized)
{
Frmrulerchk. frmlook. windowstate = formwindowstate. normal;
}
Frmrulerchk. frmlook. Activate ();
}
Catch
{
This. richtextbox1.selectall ();

This. richtextbox1.selectioncolor = color. Black;
This. richtextbox1.selectionbackcolor = color. moccasin;
This. richtextbox1.select (0, 0 );
This. richtextbox1.scrolltocaret ();
Frmlookfor FRM = new frmlookfor ();
FRM. Show (this );
}
}
}

//★★If you want to change the form to run, the icon is not displayed in the taskbar:★★★★★★★★

// Modify attributes: showintaskbar = false;

// Note: This code must be added when the image search function is disabled:

Frmrulerchk. frmlook = NULL;