c# - 更新状态栏文字

Question

这是最简单的事情，但我无法更新状态栏上的文本...我刚开始使用 C#，但找不到解决方案...在所有答案中，接受的答案是 statusBar1.Text = "text";我制作了简单的菜单并在菜单中添加了 LOAD 项。图片已加载，一切正常，只是状态文本没有更新...顺便说一句，MessageBox 还在状态栏中显示我需要的正确文本。这是我的代码，但它不起作用:

 private void menuLoad_Click(object sender, EventArgs e)
    {
        OpenFileDialog dlg = new OpenFileDialog();
        dlg.Title = "Load Photo";
        dlg.Filter = "jpg files (*.jpg)"
        + "|*.jpg|All files (*.*)|*.*";
        if (dlg.ShowDialog() == DialogResult.OK)
        {
            try
            {
                statusBar1.Text = "Loading " + dlg.FileName;
                pbxPhoto.Image = new Bitmap(dlg.OpenFile());
                statusBar1.Text = "Loaded " + dlg.FileName;
                MessageBox.Show("Text = " + dlg.FileName); 
            }
            catch (Exception ex)
            {
                statusBar1.Text = "Unable to load file " + dlg.FileName;
                MessageBox.Show("Unable to load file: " + ex.Message);
            }
        }
        dlg.Dispose();
    }

Answer 1

也许文本已设置但没有绘制，因为您的线程正忙于加载图片？您可以尝试强制状态栏失效并自行重绘:

statusBar1.Text = "Loading " + dlg.FileName;
statusBar1.Invalidate();
statusBar1.Refresh();    

pbxPhoto.Image = new Bitmap(dlg.OpenFile());

statusBar1.Text = "Loaded " + dlg.FileName;
statusBar1.Invalidate();
statusBar1.Refresh();    

MessageBox.Show("Text = " + dlg.FileName); 

实际上我想我会把它封装到一个方法中，像这样:

private void UpdateStatusBarText(string text)
{
    statusBar1.Text = text;
    statusBar1.Invalidate();
    statusBar1.Refresh();    
}

这样您的 try block 将如下所示:

UpdateStatusBarText("Loading " + dlg.FileName);

pbxPhoto.Image = new Bitmap(dlg.OpenFile());

UpdateStatusBarText("Loaded " + dlg.FileName);
MessageBox.Show("Text = " + dlg.FileName); 

编辑

StatusStrip 控件是一个容器控件。向其添加一个 ToolStripStatusLabel 项，并更改该控件的文本而不是 statusBar1 的文本:

private void UpdateStatusBarText(string text)
{
    toolStripStatusLabel1.Text = text;
    statusBar1.Invalidate();
    statusBar1.Refresh();    
}