如何在WinForms中显示显示轨迹栏值的工具提示

I'm new to C# and WinForms so please excuse me is this is a bit of a newbie question.

我是C#和WinForms的新手所以请原谅我这是一个新手问题。

I'm trying to add a tooltip to my TrackBar control which shows the current value of the bar as you drag it. I've instantiated a ToolTip object and tried the following handler code but it doesn't show any tooltip:

我正在尝试向TrackBar控件添加一个工具提示,它会在您拖动时显示该栏的当前值。我已经实例化了一个ToolTip对象,并尝试了以下处理程序代码,但它没有显示任何工具提示:

private void trackBar1_Scroll(object sender, EventArgs e)
{
   toolTip1.SetToolTip(trackBar1, trackBar1.Value.ToString());
}

2 个解决方案

#1

Adam I've just implemented a very simple version of this and it works exactly as expected...

Adam我刚刚实现了一个非常简单的版本,它完全符合预期......

Here's the init code for comparison

这是用于比较的初始化代码

    private void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
        this.trackBar1 = new System.Windows.Forms.TrackBar();
        ((System.ComponentModel.ISupportInitialize)(this.trackBar1)).BeginInit();
        this.SuspendLayout();
        // 
        // trackBar1
        // 
        this.trackBar1.Location = new System.Drawing.Point(12, 166);
        this.trackBar1.Name = "trackBar1";
        this.trackBar1.Size = new System.Drawing.Size(268, 42);
        this.trackBar1.TabIndex = 1;
        this.trackBar1.Scroll += new System.EventHandler(this.trackBar1_Scroll);
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 273);
        this.Controls.Add(this.trackBar1);
        this.Name = "Form1";
        this.Text = "Form1";
        ((System.ComponentModel.ISupportInitialize)(this.trackBar1)).EndInit();
        this.ResumeLayout(false);
        this.PerformLayout();

    }

    private void trackBar1_Scroll(object sender, EventArgs e)
    {
        toolTip1.SetToolTip(trackBar1, trackBar1.Value.ToString());

    }

And it works as I move the ticker to each additional increment...

当我将股票代码移动到每个额外的增量时,它都有效...

#2

How did you initialise the toolTip1 class? The way you set the tool tip text looks ok, maybe you have so set some general properties before the component does the job?

你是如何初始化toolTip1类的?您设置工具提示文本的方式看起来不错,也许您在组件完成工作之前设置了一些常规属性?

MSDN says

// Create the ToolTip and associate with the Form container.
ToolTip toolTip1 = new ToolTip();

// Set up the delays for the ToolTip.
toolTip1.AutoPopDelay = 5000;
toolTip1.InitialDelay = 1000;
toolTip1.ReshowDelay = 500;
// Force the ToolTip text to be displayed whether or not the form is active.
toolTip1.ShowAlways = true;

#1