系统对话框

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茗君（Major_S） 2021-08-02 13:35:55 ©著作权

文章标签 图片查看器文件对话框 c# 文本文件图片显示 文章分类 代码人生

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系统对话框系统对话框系统对话框

1.系统对话框

系统自带的一些对话框类:

OpenFileDialog打开文件对话框
SaveFileDialog保存文件对话框
FolderBrowserDialog目录选择对话框
ColorDialog颜色选择对话框
FontDialog字体选择对括框
在官方文档里，直接搜索查看示例即可

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.DefaultExt = ".cs"; 
            dlg.Filter = "C#源码文件 |*.cs"; 
            dlg.InitialDirectory = Path.GetFullPath(".");

            if(dlg.ShowDialog() == DialogResult.OK )
            {
                string fileName = dlg.FileName;
                Console.WriteLine("选中了:" + fileName);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            SaveFileDialog dlg = new SaveFileDialog();
            dlg.FileName = "新的文本文件"; 
            dlg.DefaultExt = ".txt"; 
            dlg.Filter = "Text documents (.txt)|*.txt";

            if (dlg.ShowDialog() == DialogResult.OK)
            {
                string fileName = dlg.FileName;
                Console.WriteLine("选中了:" + fileName);
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog dlg = new FolderBrowserDialog();
            dlg.SelectedPath = Path.GetFullPath(".");
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                string path = dlg.SelectedPath;
                Console.WriteLine("选中了:" + path);
            }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            ColorDialog MyDialog = new ColorDialog();
            // Keeps the user from selecting a custom color.
            MyDialog.AllowFullOpen = false;
            // Allows the user to get help. (The default is false.)
            MyDialog.ShowHelp = true;
            // Sets the initial color select to the current text color.
            MyDialog.Color = button4.ForeColor;

            // Update the text box color if the user clicks OK 
            if (MyDialog.ShowDialog() == DialogResult.OK)
            {
                button4.ForeColor = MyDialog.Color;
            }
                
        }
 

        private void button5_Click(object sender, EventArgs e)
        {
            FontDialog fontDialog1 = new FontDialog();
            fontDialog1.ShowColor = true;

            fontDialog1.Font = button5.Font;
            fontDialog1.Color = button5.ForeColor;

            if (fontDialog1.ShowDialog() != DialogResult.Cancel)
            {
                button5.Font = fontDialog1.Font;
                button5.ForeColor = fontDialog1.Color;
            }
        }
    }