RichTextBox

来源：互联网发布：权力的游戏夜王知乎编辑：程序博客网时间：2024/05/21 09:58

//自动换行

//this.richTextBox1.WordWrap = true;

//向RichTextBox1中追加内容

//this.richTextBox1.AppendText(value);

//滚动到控件光标处

//this.richTextBox1.ScrollToCaret();

2.加载选择的文件

private void btnRead_Click(object sender, EventArgs e)

{

string filepath = this.txtFilePath.Text.ToString();

if (filepath.Length == 0)

{

MessageBox.Show("请选择文件！");

return;

}

//清空RichTextBox控件中的内容

this.richTextBox1.Text = "";

this.richTextBox1.Controls.Clear();

//获取文件扩展名

string filetype = filepath.Substring(filepath.LastIndexOf(".") + 1).ToLower();

switch (filetype)

{

case "txt":

this.richTextBox1.LoadFile(filepath, RichTextBoxStreamType.PlainText);

break;

case "rtf":

this.richTextBox1.LoadFile(filepath, RichTextBoxStreamType.RichText);

break;

case "xml":

this.richTextBox1.LoadFile(filepath, RichTextBoxStreamType.RichText);

break;

case "jpg":

this.LoadPicture(filepath);

break;

case "png":

this.LoadPicture(filepath);

break;

default:

break;

}

3.加载图片的方法

private void LoadPicture(string filename)

{

Image img = Image.FromFile(filename);

PictureBox pic = new PictureBox();

pic.Width = 300;

pic.Height = 200;

pic.Image = img;

pic.SizeMode = PictureBoxSizeMode.StretchImage;

this.richTextBox1.Controls.Add(pic);

}

4，保存richtextbox的内容

private void btnSave_Click(object sender, EventArgs e)

{

saveFileDialog1.RestoreDirectory = false;

saveFileDialog1.FileName = "export.rtf";

string filepath = "";

if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

filepath = this.saveFileDialog1.FileName;

}

this.richTextBox1.SaveFile(filepath);

//如果保存的是txt格式

//this.richTextBox1.SaveFile(filepath,RichTextBoxStreamType.PlainText);

MessageBox.Show("保存成功！");

}

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