C# chapter 4 : C# or C sharp For Beginer, Working with Text

C# chapter 4 :


For any one that have not read chapter 1 , 2  & 3 ,
Please refer C# chapter  1 , 2  & 3   if have any question.

OK!  Let continue !

Working with Text

Deleting part of the line
Line count start from 0, so if Line is:  ABCD
A=0 , B=1 , C=2 , D=3

C#   code:


        private void button1_Click(object sender, EventArgs e)
        {
            string STR_A;
            string STR_D;
            STR_A = "abcdefgh";
            textBox1.Text = STR_A;
            STR_D = STR_A.Remove(0, 2);
            textBox1.Text = textBox1.Text + "\r\n" + STR_D;
        }


THEN  Select  Debug -> Start without Debugging
~  ~ Wait for a while  ~ ~ ~
The program Form screen will come out.
Let  click on button1
     abcdefgh
     cdefgh
will show up  inside the Textbox.

Remove(A, B)
A =  start from ?
B =  How many character to be delete

for the program above  Remove(0, 2)   is  start from the 1st position in line , delete 2 character
abcdefgh
" a "  is the one at the 1st position in line ,
delete 2 character , so    " a "    &    " b "     had been deleted.
abcdefgh      become       cdefgh



Example 2:

        private void button1_Click(object sender, EventArgs e)
        {
            string STR_A;
            string STR_D;
            STR_A = "abcdefgh";
            textBox1.Text = STR_A;
            STR_D = STR_A.Remove(5, 1);
            textBox1.Text = textBox1.Text + "\r\n" + STR_D;
        }

THEN  Select  Debug -> Start without Debugging
~  ~ Wait for a while  ~ ~ ~
The program Form screen will come out.
Let  click on button1
     abcdefgh
     abcdegh
will show up  inside the Textbox.


Remove(A, B)
A =  start from ?
B =  How many character to be delete

for the program above  Remove(5, 1)   is  start from the 6th position in line , delete 1 character
abcdefgh
" f "  is the one at the 6th position in line ,
delete 1 character , so only  " f "   that had been deleted. 
abcdefgh      become       abcdegh


Must  Remember  This
Line count start from 0, so if Line is:  ABCD
A=0 , B=1 , C=2 , D=3

Line count start from 0

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