winform 保存文件 打开文件 选择文件 字体样式颜色（流 using System.IO;）

1 string filePath = "";
2
3         private void 保存SToolStripMenuItem_Click(object sender, EventArgs e)
4         {
5             if (filePath.Length <= 0)
6             {
7                 saveFileDialog1.Filter = "文本文件|*.txt";
8                 saveFileDialog1.FileName = "新建文本文件";
9                 DialogResult dr = saveFileDialog1.ShowDialog();
10
11                 if (dr == DialogResult.OK)
12                 {
13                     string path = saveFileDialog1.FileName;
14                     StreamWriter sw = new StreamWriter(path);
15                     sw.Write(textBox1.Text);
16                     sw.Flush();
17                     filePath = path;
18                 }
19             }
20             else
21             {
22                 StreamWriter sw = new StreamWriter(filePath);
23                 sw.Write(textBox1.Text);
24                 sw.Flush();
25             }
26
27         }

1 private void 打开OToolStripMenuItem_Click(object sender, EventArgs e)
2         {
3             openFileDialog1.Filter = "文本文件|*.txt|C#代码文件|*.cs|全部文件|*.*";
4             DialogResult dr = openFileDialog1.ShowDialog();
5             if (dr == DialogResult.OK)
6             {
7                 string path = openFileDialog1.FileName;
8
9
10                 StreamReader sr = new StreamReader(path, Encoding.Default);
11                 textBox1.Text = sr.ReadToEnd();
12
13                 string[] name = openFileDialog1.FileName.Split('\\');
14
15                 this.Text = name[name.Length - 1] + " - 记事本";
16
17             }
18         }

1 private void 选择文件夹ToolStripMenuItem_Click(object sender, EventArgs e)
2         {
3             DialogResult dr = folderBrowserDialog1.ShowDialog();
4             if (dr == DialogResult.OK)
5             {
6                 textBox1.Text = folderBrowserDialog1.SelectedPath;
7
8             }
9         }

1 private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)
2         {
3             DialogResult dr = fontDialog1.ShowDialog();
4
5             if (dr == DialogResult.OK)
6             {
7                 textBox1.Font = fontDialog1.Font;
8                 textBox1.ForeColor = fontDialog1.Color;
9
10
11             }
12         }