how to read data from richtextbox for each click line by line in dotnet(desktop application)

Question

1.00/5 (2 votes)

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Hi.
i have one rich text box as txtshowfile, one text box as txtsearchgerman.when i am click on button event it should read one line and when i click second time it should read second line.

i am using this code.

C#

int textEnd = txtshowfile.TextLength;
                    int  index = 0;
                    int lastIndex  = txtshowfile.Text.LastIndexOf(txtsearchgerman.Text);
                                           while (index < lastIndex)
                        {
                            txtshowfile.Find(txtsearchgerman.Text, index, textEnd, RichTextBoxFinds.None);
                            txtshowfile.SelectionBackColor = Color.Yellow;
                            index = txtshowfile.Text.IndexOf(txtsearchgerman.Text, index) + 1;
                        }

when i search specific word than it gives all that word.but i want to read line by line word for each click.

Thanks in advance.....

[edit]"Treat my content as plain text..." option disabled - OriginalGriff[/edit]

Posted 22-Jan-12 19:45pm

mayankshrivastava

Updated 22-Jan-12 21:07pm

OriginalGriff

v2

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Comments

Sergey Alexandrovich Kryukov 23-Jan-12 3:24am

The question is not fully defined. Do you think there is only one class named RichTextBox? No! You need to specify fully-qualifies type name, with namespace. You also need to tag the UI library. WPF, Forms, what?
--SA

mayankshrivastava 23-Jan-12 4:07am

hi,i have a one richtextbox as txtshowfile and one text box as txtsearchgerman and one button ok
suppose there is a 10 sentences in txtshowfile line by line.i want to search a one word from txtshowfile.that word i write in txtsearchgerman ok.
when i click on button then i want specific search word as highlight.it works
but i want line by line check .
if In first line there are three specific words then i want all three word highlighted.
Hope you understand.
its urgent please help me out.

4 solutions

Solution 2

In order to do that, you need to move index out of the method, and into the class:

C#

int index = 0;
private void ReadNextLine()
   {
   ...
   }

That way, it will be preserved between button clicks, assuming this is WinForms.

Posted 22-Jan-12 21:10pm

OriginalGriff

Solution 3

split it by "\n" you can get all lines in array

Posted 7-Jan-13 21:28pm

sivakumarhyd1

Solution 4

for (int i = 0; i >= richTextBox1.Lines.Count; i++)
{
// you can do what ever you want with the below one
richTextBox1.Lines[ i ];
}

Posted 7-Jan-13 21:32pm

sivakumarhyd1

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RDBurmon · Accepted Answer · 2012-01-22T21:08:00

Solution 1

C#

int textEnd = txtshowfile.TextLength;
    int index = 1;
    int prevIndex = Convert.ToInt16( txtshowfile.Tag);
    int lastIndex = txtshowfile.Text.LastIndexOf(txtsearchgerman.Text);
    txtshowfile.SelectionBackColor = Color.White;
    prevIndex = txtshowfile.Text.IndexOf(txtsearchgerman.Text, prevIndex + 1);
    txtshowfile.Tag = prevIndex;
    index = prevIndex;
    if (prevIndex  < 0)
  {
      index = 0;
      txtshowfile.Tag = 0;
  }
        txtshowfile.Find(txtsearchgerman.Text, index, textEnd, RichTextBoxFinds.None);
        txtshowfile.SelectionBackColor = Color.Yellow;
        index = txtshowfile.Text.IndexOf(txtsearchgerman.Text, index) + 1;

}

Posted 22-Jan-12 21:08pm

RDBurmon

Comments

mayankshrivastava 23-Jan-12 3:56am

Thanks for reply
its working but i want if in first line there are more then one specific word so all are highlighted.

RDBurmon 23-Jan-12 4:07am

Elaborate your statement with example please .

mayankshrivastava 23-Jan-12 4:52am

hi,i have a one richtextbox as txtshowfile and one text box as txtsearchgerman and one button ok suppose there is a 10 sentences in txtshowfile line by line.i want to search a one word from txtshowfile.that word i write in txtsearchgerman ok. when i click on button then i want specific search word as highlight.it works but i want line by line check . if In first line there are three specific words then i want all three word highlighted. Hope you understand. its urgent please help me out.