如何让UserControl添加附件

Question

如何在 Windows 应用程序 c#

中创建用户控件

我需要在表单中制作附件文件，但我需要在单击时使用用户控件按钮浏览并选择文件或图像在表单中添加用户控件？

Answer 1

在表单上添加一个按钮并使用OpenFileDialog，像这样：

private void buttonGetFile_Click(object sender, EventArgs e)
{
    OpenFileDialog dialog = new OpenFileDialog();
    dialog.Filter = "Text files | *.txt"; // file types, that will be allowed to upload
    dialog.Multiselect = false; // allow/deny user to upload more than one file at a time
    if (dialog.ShowDialog() == DialogResult.OK) // if user clicked OK
    {
        String path = dialog.FileName; // get name of file
        using (StreamReader reader = new StreamReader(new FileStream(path, FileMode.Open), new UTF8Encoding())) // do anything you want, e.g. read it
        {
            // ...
        }
    }
}

如何让UserControl添加附件

How to make UserControl add attachments

c#

c#-4.0