ErrorProvider-更改BackColor而不显示图标 [英] ErrorProvider - Change BackColor Instead of Showing Icon

问题描述

我遇到了一些我想升级的遗留代码.我想更改ErrorProvider在控件上显示错误状态的方式.默认行为是图标，如果将鼠标悬停在图标上，则默认值为ToolTip.

I'm stuck with some legacy code that I want to upgrade a bit. I want to change the way the ErrorProvider shows the error status on a Control. Default behavior is the Icon, and a ToolTip if you hover on the icon.

我想将此行为更改为与我们在WPF控件中使用的行为更相似.这是红色的底色(鲑鱼粉)和控件本身的工具提示.

I would like to change this behavior to be more similar to what we use in our WPF controls. Which is a red back-color(Salmon pink) and the tool-tip on the control itself.

任何提示，链接或前进的方式

Any tips, links or some way forward

编辑. 有关我最终得到的结果，请参见下面的答案.

EDIT. See my answer below, on what i ended up with.

推荐答案

ErrorProvider组件不支持此功能，如果需要，可以自己创建.

ErrorProvider component doesn't support this feature and if you need it you can create it yourself.

您可以订阅BindingManagerBase的BindingComplete事件，然后可以使用类型为BindingCompleteEventArgs的事件arg，该事件包含一些有用的属性:

You can subscribe to BindingComplete event of a BindingManagerBase and then you can use the event arg which is of type BindingCompleteEventArgs that contains some useful properties:

• ErrorText确定数据绑定中是否存在错误
• Binding.Control确定绑定到的控件

• ErrorText to determine if there is an error in data-binding
• Binding.Control to determine the control which is bounded to

这些足以让我们实施我们的解决方案.

These are enough for us to implement our solution.

代码

这是一个示例代码，它显示如何处理BindingComplete事件并根据其有效或无效状态使用它来更改BackColor和控件的工具提示.

Here is a sample code which shows how can you handle BindingComplete event and use it to change BackColor and tool-tip of a control based on it's valid or invalid state.

假设您有一个绑定源myBindingSource，该源已绑定到实现为IDataErrorInfo的SampleModel类.您可以订阅this.BindingContext[this.myBindingSource]的BindingComplete事件:

Suppose you have a binding source, myBindingSource which is bound to a SampleModel class which is implemented IDataErrorInfo. You can subscribe to BindingComplete event of this.BindingContext[this.myBindingSource]:

private void Form1_Load(object sender, EventArgs e)
{
    this.myBindingSource.DataSource = new SampleModel();

    var bindingManager = this.BindingContext[this.myBindingSource];
    bindingManager.BindingComplete += bindingManager_BindingComplete;
}

Dictionary<Control, Color> Items = new Dictionary<Control, Color>();
private void bindingManager_BindingComplete(object sender, BindingCompleteEventArgs e)
{
    var control = e.Binding.Control;
    //Store Original BackColor
    if (!Items.ContainsKey(control))
        Items[control] = control.BackColor;

    //Check If there is an error
    if (!string.IsNullOrEmpty(e.ErrorText))
    {
        control.BackColor = Color.Salmon;
        this.errorToolTip.SetToolTip(control, e.ErrorText);
    }
    else
    {
        e.Binding.Control.BackColor = Items[e.Binding.Control];
        this.errorToolTip.SetToolTip(control, null);
    }
}

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