find in Rich_Text_Box

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Hi,
i have a Rich_textbox and two text_box and a button, i want when i write any thing in rich_textbox and write a word in text_box1 and click button, find the word in rich_textbox.
and when find it replace whit the text in text_box2
plz help.
sorry for my english

Posted 3-Oct-12 23:53pm

amirmohamad

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Shambhoo kumar · Answer 1 · 2012-10-04T00:42:00

for Find text

Quote:
private void button1_Click(object sender, EventArgs e)
{
string str = richTextBox1.Text;
if (str.Contains(textBox1.Text))
{
label1.Text = "True";
}
else
{
label1.Text = "False";
}
}

for replace text

str.Replace(Textbox1.text,textbox2.text)

I hope This code really help u

Regard
Sham
:)

**JF2015** · Answer 2 · 2012-10-04T00:36:00

You should use this code for the event handler of the button:

C#

private void button1_Click(object sender, EventArgs e)
{
   string strTextToFind = TextBox1.Text;
   string strTextToReplace = textBox2.Text;
   richTextBox1.Text.Replace(strTextToFind, strTextToReplace);
}

Basically the String.Replace method searches for the string (strTextToFind) and when it finds it, it replaces it with another string (strTextToReplace).

Mohd. Mukhtar · Answer 3 · 2012-10-04T00:24:00

Solution 2

Hi Amir,

Please add below code in your button click event method.

string str1= RichTextbox.Text;

int loc = str1.IndexOf(TextBox1.Text);

if(loc == -1)
{
return;
}
else
{
str1.replace(Textbox1.Text, Textbox2.Text)
}
RichTextBox.Text = str1;

Posted 4-Oct-12 0:24am

Mohd. Mukhtar

Updated 4-Oct-12 0:40am

v3

Comments

amirmohamad 4-Oct-12 6:36am

tank's for help
and how i can find it?

Mohd. Mukhtar 4-Oct-12 6:40am

int loc = str1.IndexOf(TextBox1.Text);

in this line we are checking that any occurance of that Textbox1 is avail into the rich text or not.

if loc will give positive result then we replace those text in else block.

Oshtri Deka · Answer 4 · 2012-10-04T00:15:00

Solution 1

Use string's Replace method.

C#

txtRichTextBox.Text.Replace(oldWord,newWord);

Posted 4-Oct-12 0:15am

Oshtri Deka

Comments

amirmohamad 4-Oct-12 6:18am

How i can Find it?
and after find replace it

Oshtri Deka 4-Oct-12 11:01am

Why don't you read about Replace method? I've supplied you a link.

In short Replace method finds ALL references of particular string and replaces it with with another. It's simple as that.

find in Rich_Text_Box

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