C# Windows 窗体打印对话框单击“确定”两次有响应

发布于 2024-08-28 22:00:33 字数 623 浏览 7 评论 0原文

我正在使用 Visual Studio 2008、.net Framework 3.5 来开发我正在开发的 Windows 窗体客户端-服务器应用程序。当我运行程序并尝试打印时出现一个奇怪的错误。打印对话框打开，但我必须单击“确定”按钮两次才能正常工作。第二次点击后，一切正常，没有错误。当我在 if (result == DialogResult.OK) 上放置断点时，断点直到第二次单击才会触发。这是代码：

private void tbPrint_Click(object sender, EventArgs e)
{
    try
    {
        printDialog1.Document = pDoc;

        DialogResult result = printDialog1.ShowDialog();

        if (result == DialogResult.OK)
        {
            pDoc.PrinterSettings.PrinterName = printDialog1.PrinterSettings.PrinterName;
            pDoc.Print();
        }
        ...

这让我发疯，我看不到任何其他会干扰它的东西。

原文

I'm using Visual Studio 2008, .net Framework 3.5 for a Windows forms client-server app that I'm working on. There is a weird bug when I run the program and try to print. The print dialog box opens, but I have to click the OK button twice for it to work. After the second click it works fine, no errors. When I put a breakpoint on: if (result == DialogResult.OK) , the breakpoint doesn't trigger until the second click. Here is the code:

private void tbPrint_Click(object sender, EventArgs e)
{
    try
    {
        printDialog1.Document = pDoc;

        DialogResult result = printDialog1.ShowDialog();

        if (result == DialogResult.OK)
        {
            pDoc.PrinterSettings.PrinterName = printDialog1.PrinterSettings.PrinterName;
            pDoc.Print();
        }
        ...

This is driving me crazy, and I can't see anything else that would interfere with it.

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泪眸﹌ 2024-09-04 22:00:33

我在 C#/WinForms 中使用 OpenFileDialog 时遇到了“第一个工具条单击无法识别”的情况。经过多次咒骂和谷歌搜索后，我这样做了：

在toolstrip1_Click中：

private void toolStrip1_Click(object sender, EventArgs e)
{
  this.Validate();
}

在使用调用OpenFileDialog的函数中：

private voidlocateMappingToolStripMenuItem_Click（对象发送者，EventArgs e）
{
  OpenFileDialog dg = new System.Windows.Forms.OpenFileDialog();
  if (dg.ShowDialog() == DialogResult.OK)
  {
    文件位置 = Path.GetDirectoryName(dg.FileName);
    尝试
    {
      如果（加载数据（））
      {
        //启用工具栏按钮
        toolStripButton3.Enabled = true;
        toolStripButton5.Enabled = true;
        toolStripButton1.Enabled = true;
        toolStripButton2.Enabled = true;
        searchParm.Enabled = true;
        toolStripButton4.Enabled = true;
        toolStripButton6.Enabled = true;
        exitToolStripMenuItem.Enabled = true;
        EditorForm.ActiveForm.TopLevelControl.Focus();
      }
    }
    捕获（异常 ex） 
    {
      MessageBox.Show(exx.Message + Environment.NewLine + exx.InnerException);
    }
  }
}

两行似乎是关键：

当 OpenFileDialog 关闭时，焦点需要重置到主窗口 (EditorForm.ActiveForm.TopLevelControl.Focus();)
单击工具条按钮时，工具条会验证自身 (this.Validate()) 并识别鼠标事件。

I came across this while having the "first toolstrip click unrecognized" using an OpenFileDialog in C#/WinForms. After much cursing and googling, I did this:

In toolstrip1_Click:

private void toolStrip1_Click(object sender, EventArgs e)
{
  this.Validate();
}

In the function that uses calls OpenFileDialog:

private void locateMappingToolStripMenuItem_Click(object sender, EventArgs e)
{
  OpenFileDialog dg = new System.Windows.Forms.OpenFileDialog();
  if (dg.ShowDialog() == DialogResult.OK)
  {
    fileLocation = Path.GetDirectoryName(dg.FileName);
    try
    {
      if (LoadData())
      {
        //Enable toolbar buttons
        toolStripButton3.Enabled = true;
        toolStripButton5.Enabled = true;
        toolStripButton1.Enabled = true;
        toolStripButton2.Enabled = true;
        searchParm.Enabled = true;
        toolStripButton4.Enabled = true;
        toolStripButton6.Enabled = true;
        exitToolStripMenuItem.Enabled = true;
        EditorForm.ActiveForm.TopLevelControl.Focus();
      }
    }
    catch (Exception exx) 
    {
      MessageBox.Show(exx.Message + Environment.NewLine + exx.InnerException);
    }
  }
}

Two things lines seem to be key:

When the OpenFileDialog closes, focus needs to be reset to the main window (EditorForm.ActiveForm.TopLevelControl.Focus();)
When the toolstrip button is clicked, the toolstrip validates itself (this.Validate()) and recognizes the mouse event.

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生死何惧 2024-09-04 22:00:33

我使用计时器实现了它。

将一个计时器放到包含工具条的表单上，并将其变成一个延迟为 1 毫秒的一次性计时器。注意：计时器最初必须将“启用”设置为“假”

private void toolStripBtnPrint_Click(object sender, EventArgs e)
{
   timer1.Interval = 1; // 1ms
   timer1.Enabled = true;
}

创建计时器滴答事件处理程序

private void timer1_Tick(object sender, EventArgs e)
{
    timer1.Enabled = false;
    PrintDialog printDialogue=new PrintDocument();        
    //Do your initialising here
    if(DialogResult.OK == printDialogue.ShowDialog())
    {
        //Do your stuff here
    }
}

它可能很脏，但它让我摆脱了困境。华泰

I achieved it using a timer.

Drop a timer onto the form containing the toolstrip and turn it into a one shot timer with a delay of say 1mS. Note: Timer must initially have 'Enabled' set to 'False'

private void toolStripBtnPrint_Click(object sender, EventArgs e)
{
   timer1.Interval = 1; // 1ms
   timer1.Enabled = true;
}

Create a timer tick event handler

private void timer1_Tick(object sender, EventArgs e)
{
    timer1.Enabled = false;
    PrintDialog printDialogue=new PrintDocument();        
    //Do your initialising here
    if(DialogResult.OK == printDialogue.ShowDialog())
    {
        //Do your stuff here
    }
}

It may be dirty but it got me out of a hole. HTH

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