我如何在C＃中的鼠标点击事件添加到网站的TextBox [英] How can I add mouse click event to Web TextBox in c#

问题描述

我如何在C＃中的鼠标点击事件添加到网页文本框

How can I add mouse click event to Web TextBox in c#

推荐答案

如果您正在寻找服务器端的Click事件。试试这个。

If you are looking for server side click event. Try this.

public class TextBox : System.Web.UI.WebControls.TextBox, System.Web.UI.IPostBackEventHandler
{

    private static readonly object _clickEvent = new object();

    [System.ComponentModel.Category("Action")]
    public event EventHandler Click
    {
        add { base.Events.AddHandler(_clickEvent, value); }
        remove { base.Events.RemoveHandler(_clickEvent, value); }
    }

    protected virtual void OnClick(EventArgs e)
    {
        EventHandler handler = (EventHandler)base.Events[_clickEvent];
        if (handler != null) handler(this, e);
    }

    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
    {
        base.AddAttributesToRender(writer);

        writer.AddAttribute(System.Web.UI.HtmlTextWriterAttribute.Onclick, base.Page.ClientScript.GetPostBackEventReference(this, null));
    }

    #region IPostBackEventHandler Members

    void System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(string eventArgument)
    {
        this.OnClick(EventArgs.Empty);
    }

    #endregion

}

---

<pages>
  <tagMapping>
    <add tagType="System.Web.UI.WebControls.TextBox"
         mappedTagType="{namespace}.TextBox"/>
  </tagMapping>
</pages>

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