Windows 窗体应用开发——应用对话框控件

C#里给我们提供了很多很好的对话框控件，如ColorDialog, FontDialog ,OpenFileDialog, SaveFileDialog,

here I did a test just now:

 

加入上述四个控件，在加入四个按钮分别予以实现：

以下是按钮的消息响应函数：

 

private void button1_Click(object sender, EventArgs e) { openFileDialog1.Reset(); openFileDialog1.Filter = "文本文件(*.txt)|*.txt"; openFileDialog1.CheckFileExists = true;//如果user指定不存在的文件名，是否发出警告 openFileDialog1.CheckPathExists = true;//如果user指定不存在的路径，是否发出警告 openFileDialog1.Multiselect = false;//设置对话框是否允许选择多个文件 openFileDialog1.Title = "打开文件"; if (openFileDialog1.ShowDialog(this) == DialogResult.OK) { richTextBox1.LoadFile(openFileDialog1.FileName, RichTextBoxStreamType.PlainText); } } private void button2_Click(object sender, EventArgs e) { if (MessageBox.Show("确定退出？","ASK", MessageBoxButtons.YesNo,MessageBoxIcon.Question) == DialogResult.Yes) Application.Exit(); } private void button3_Click(object sender, EventArgs e) { fontDialog1.ShowApply = false;//设置该弹出的字体对话框是否包含"应用"按钮 fontDialog1.ShowEffects = true;//是否包含"删除线、下划线"项 fontDialog1.ShowColor = true; //set all colors colorDialog1.AnyColor = true; colorDialog1.AllowFullOpen = true; colorDialog1.FullOpen = true; if (fontDialog1.ShowDialog(this) == DialogResult.OK) { richTextBox1.Font = fontDialog1.Font; if (colorDialog1.ShowDialog(this) == DialogResult.OK) richTextBox1.ForeColor = colorDialog1.Color; // richTextBox1.ForeColor = fontDialog1.Color; } } private void button4_Click(object sender, EventArgs e) { saveFileDialog1.Reset(); saveFileDialog1.Filter = "文本文件(*.txt)|*.txt"; saveFileDialog1.Title = "另存为"; if (saveFileDialog1.ShowDialog() == DialogResult.OK) { richTextBox1.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.PlainText); } }