C# 记事本功能实现

一、文件

1.打开

        private void fOpen_Click(object sender, EventArgs e)
        {
            
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                richTextBox1.LoadFile(openFileDialog1.FileName, RichTextBoxStreamType.PlainText);
            }
            path = openFileDialog1.FileName;
            //该path保存打开文件的路径，方便后续操作
        }

2.保存/另存为

另存为：调出saveFileDialog1来进行该操作。

保存：若保存路径不为空（比如在目录下打开该文件path = openFileDialog1.FileName;），则默认保存在该路径下；若路径为空（新建文件），则执行另存为操作。

        private void mOpen_Click(object sender, EventArgs e)
        {
            if (path != null)
            {
                richTextBox1.SaveFile(path, RichTextBoxStreamType.PlainText);
                MessageBox.Show("已保存");
            }
            else
            {
                if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    richTextBox1.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.PlainText);
                }
                MessageBox.Show("已保存");
                path=saveFileDialog1.FileName;
            }
        }

3.页面设置

        private void Pagesetting_Click(object sender, EventArgs e)
        {
            pageSetupDialog1.Document = printDocument1;
            try
            {
                pageSetupDialog1.ShowDialog();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "打印出错");
            }
        }

4.打印

        private void fPrint_Click(object sender, EventArgs e)
        {
            if (printDialog1.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    printDocument1.Print();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }

            }
        }

 

二、编辑

1.richTextBox功能调用

        richTextBox1.Copy();
        richTextBox1.Cut();
        richTextBox1.Paste();
        richTextBox1.SetAll();
        richTextBox1.Undo();    

2.查找、查找下一个、替换、转到

 

 

 

 

三、格式

1.字体

        private void Font_Click(object sender, EventArgs e)
        {
            FontDialog fontDialog = new FontDialog();
            fontDialog.Color = richTextBox1.ForeColor;
            fontDialog.AllowScriptChange = true;
            fontDialog.ShowColor = true;
            if (fontDialog.ShowDialog() != DialogResult.Cancel)
            {
                richTextBox1.SelectionFont = fontDialog.Font;
                richTextBox1.SelectionColor = fontDialog.Color;
            }  
        }

2.combobox改变字体大小

        private void toolStripComboBox1_TextChanged(object sender, EventArgs e)
        {
            richTextBox1.SelectionFont = new Font(toolStripComboBox1.Text, Convert.ToSingle(toolStripComboBox1.Text));

        }

3.对齐格式

        richTextBox1.SelectionAlignment = HorizontalAlignment.Left; 
        richTextBox1.SelectionAlignment = HorizontalAlignment.Right;
        richTextBox1.SelectionAlignment = HorizontalAlignment.Center;

 

 四、工具

1.字数统计

private void richTextBox1_TextChanged(object sender, EventArgs e)
        {
            char[] ch=richTextBox1.Text.Substring(0,richTextBox1.TextLength).ToCharArray();
            if (richTextBox1.Text != "")
            {
                for (int i = 0; i < richTextBox1.TextLength; i++)
                {
                    if (ch[i] >= 0 && ch[i] <= 127)
                    {
                        if (ch[i] >= 'a' && ch[i] <= 'z' || ch[i] >= 'A' && ch[i] <= 'Z')
                        {
                            letters.Text = "字母：" + (++letter_sum);
                        }
                        else if (ch[i] == ' ') space.Text = "空格：" + (++space_sum);
                    }
                    else if (ch[i] >= 0x4e00 && ch[i] <= 0x9fbb) chinese.Text = "汉字：" + (++chinese_sum);
                }

                letter_sum = 0;
                space_sum = 0;
                chinese_sum = 0;
                total.Text = "总字符：" + richTextBox1.Text.Length.ToString();
                lines_sum = richTextBox1.GetLineFromCharIndex(richTextBox1.Text.Length) + 1;
                lines.Text = "行数：" + (lines_sum);
            }
            else
            {
                letters.Text = "0";
                space.Text = "0";
                chinese.Text = "0";
                total.Text = "0";
            }


               
        }

 

 

转载于:https://www.cnblogs.com/Mr-4/archive/2013/04/09/3010960.html