C# 如何在 C#中将 ToolTip 设置为 active？

如何在 C# 中将 ToolTip 设置为 active？

原文:https://www . geeksforgeeks . org/如何设置-工具提示-在 c-sharp 中激活/

在 windows 窗体中，工具提示代表一个微小的弹出框，当您将指针或光标放在控件上时，该框会出现，该控件的目的是提供有关 Windows 窗体中控件的简要说明。在工具提示中，可以使用活动属性检查工具提示是否活动。该属性的默认值为真。当活动属性设置为真时，意味着工具提示框将在屏幕上弹出，当活动属性设置为假时，意味着工具提示框不会在屏幕上弹出。您可以通过两种不同的方式设置此属性:

1。设计时:最简单的方法是设置活动属性的值，如以下步骤所示:

第一步:创建如下图所示的窗口表单: Visual Studio->File->New->Project->windows formpp
Step 2: Drag the ToolTip from the ToolBox and drop it on the form. When you drag and drop this ToolTip on the form it will automatically add on the properties(named as ToolTip on ToolTip1) of every controls present in the current windows from.
Step 3: After drag and drop you will go to the properties of the ToolTip and set the value of the Active property.

输出:

2。运行时:比上面的方法稍微复杂一点。在此方法中，您可以借助给定的语法以编程方式设置工具提示的活动属性:

public bool Active { get; set; }

这里，该属性的值为系统。布尔类型。因此，要激活工具提示，请将该属性的值设置为 true。否则，假的。以下步骤显示了如何动态设置工具提示的“活动”属性:

步骤 1: 使用 ToolTip()构造函数创建工具提示，该构造函数由 ToolTip 类提供。

```cs // Creating a ToolTip ToolTip t = new ToolTip();

```
第二步:创建工具提示后，设置工具提示类提供的工具提示的活动属性。

```cs // Setting the Active property t.Active = true;

```
Step 3: And last add this ToolTip to the controls using SetToolTip() method. This method contains the control name and the text which you want to display in the ToolTip box.

cs t.SetToolTip(box1, "Name should be start with Capital letters");

示例:

```cs using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;

namespace WindowsFormsApp33 {

public partial class Form1 : Form {

public Form1()     {         InitializeComponent();     }

private void Form1_Load(object sender, EventArgs e)     {         // Creating and setting the         // properties of the Label         Label l1 = new Label();         l1.Location = new Point(140, 122);         l1.Text = "Name";

// Adding this Label control to the form         this.Controls.Add(l1);

// Creating and setting the         // properties of the TextBox         TextBox box1 = new TextBox();         box1.Location = new Point(248, 119);         box1.BorderStyle = BorderStyle.FixedSingle;

// Adding this TextBox         // control to the form         this.Controls.Add(box1);

// Creating and setting the         // properties of the Label         Label l2 = new Label();         l2.Location = new Point(140, 152);         l2.Text = "Password";

// Adding this Label control to the form         this.Controls.Add(l2);

// Creating and setting the         // properties of the TextBox         TextBox box2 = new TextBox();         box2.Location = new Point(248, 145);         box2.BorderStyle = BorderStyle.FixedSingle;

// Adding this TextBox         // control to the form         this.Controls.Add(box2);

// Creating and setting the         // properties of the ToolTip         ToolTip t = new ToolTip();         t.Active = true;         t.SetToolTip(box1, "Name should be start with Capital letters");         t.SetToolTip(box2, "Password should be greater than 8 words");     } } } ```

输出: