Multi richtextbox with multi tab

Tanmay Sarkar

I get a problem, I dynamicaly build a tab with richtextbox. & want to save it. but i can't save that. Can you help me please?

my code is as follows,

int counter=0;
        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TabPage tp = new TabPage();
            this.tabControl1.Controls.Add(tp);
            RichTextBox rt = new RichTextBox();
            rt.Dock = System.Windows.Forms.DockStyle.Fill;
            counter++;
            tp.Name = "New Doc "+Convert.ToString(counter);
            tp.Text = "New Doc " + Convert.ToString(counter);
            tp.Controls.Add(rt);
        }

I think we can get the selected tab like, tabControl1.SelectedTab

but how get the richtextbox to save the content.

Thank you!

6 Replies

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theLizard16y ago
Accepted answer
As I said, you need to manage things.

You cannot declare the rich text box inside the method it must be done globally and you must have an array of text boxes.

RichTextBox[] theBoxes = new RichTextBox[0];

private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TabPage tp = new TabPage();

            this.tabControl1.Controls.Add(tp);

tp.Name = "re" + IntToStr(this.tabControl1.TabCount);

Array.Resize(ref, theBoxes, theBoxes.Length+1)
theBoxes[theBoxes.Length -1] = new RichTextBox();
theBoxes[theBoxes.Length -1].Name = tp.Name;

then to access the text box

Control[] controls = this.tabControl1.Controls.Find(tp.Name,false);

then you can do

controls[0].SaveToFile ....

I have not tested thie so you will need to work it out ...

            RichTextBox rt = new RichTextBox();
            rt.Size = new System.Drawing.Size(453, 325);
            rt.Dock = System.Windows.Forms.DockStyle.Fill;
            tp.Text = "New Doc";
            tp.ImageIndex = 0;
            tp.Controls.Add(rt);
        }
Tanmay Sarkar16y ago
thank you sir, it solve now! :)
Tanmay Sarkar16y ago
Thank you sir, for your long support.

when i dynamically build it, code is

private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TabPage tp = new TabPage();
            this.tabControl1.Controls.Add(tp);
            RichTextBox rt = new RichTextBox();
            rt.Size = new System.Drawing.Size(453, 325);
            rt.Dock = System.Windows.Forms.DockStyle.Fill;
            tp.Text = "New Doc";
            tp.ImageIndex = 0;
            tp.Controls.Add(rt);
        }

And as you mention to save the richtextbox, the code is

private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            TabPage tp=(TabPage)tabControl1.TabPages[tabControl1.SelectedIndex];
            Control[] controls = tp.Controls.Find("rt",false);
            RichTextBox rt1 = (RichTextBox)controls[0];
            rt1.AppendText("Hello");
            rt1.SaveFile(@"C:\123.rtf", RichTextBoxStreamType.PlainText);
        }

in control[] line, you wrote,

Control[] controls = tp.Controls.Find("the name of the RichTextBox", false);

as when i built it i use rt so i write,

Control[] controls = tp.Controls.Find("rt",false);

but it gets an exception,

System.IndexOutOfRangeException: Index was outside the bounds of the array.

help me please.

with regards,
theLizard16y ago
in    private void TabControl_Click(object sender, EventArgs e)

      tp = (TabPage)TabControl.TabPages[TabControl.SelectedIndex];

      Control[] controls = tp.Controls.Find("the name of the RichTextBox", false);

      RichTextBox rt = (RichTextBox)controls[0];

      rt.AppendText("Hello");
      rt.SaveFile(@"the path and file name", RichTextBoxStreamType.PlainText);

to open files

      rt.LoadFile(@"the path and file name", RichTextBoxStreamType.PlainText);

This is just an example,

in the click event you would get the tab text which might be something like the "c:\folder\the file.txt"

currentFile = tp.Text;

then when you want to save the file

rt.SaveFile(currentFile, RichTextBoxStreamType.PlainText);

in the click event of the RichTextBox you can set which is the current text box in the similar way

global declaration

RichTextBox currentTextBox = null;

    private void richTextBox1_Click(object sender, EventArgs e)
      {
       currentTextBox = (RichTextBox)sender;
      }

then

currentTextBox .SaveFile(currentFile, RichTextBoxStreamType.PlainText);
Tanmay Sarkar16y ago
If i wrote "hello world" in rich text box &use the code

tabControl1.SelectedTab.Controls[0]

then the data will be store as

"System.Windows.Forms.RichTextBox, Text: hello world"

not "hello world"

can you help me please!

Thank you!
Roy S16y ago
The richtextbox becomes the only control of the tab so I think you can get it like this:
tabControl1.SelectedTab.Controls[0]