Question

我有一个继承GridView的自定义控件。我又写了一个继承BoundField的类来创建一个将图像显示到ButtonClick控件中的列。当我点击它时，这个“图像列”会引发一个事件。在第一个GridView自定义控件中，我绑定了“图像列单击”事件。它永远不会被解雇。

图片列代码：

using System.Web.UI;
using System.Web.UI.WebControls;
using WebControls.Infrastructure;

namespace WebControls
{

    public class DataSearchGridImageColumn : BoundField
    {

        public event StringDelegate ImageClicked;

        public string ImageUrl
        {
            get
            {
                return (string)ViewState["ImageUrl"] ?? string.Empty;
            }
            set
            {
                ViewState["ImageUrl"] = value;
            }
        }

        protected override void InitializeDataCell(DataControlFieldCell cell, DataControlRowState rowState)
        {
            var img = new ImageButton
            {
                ID = "ImgSelectRecord",
                ImageUrl = ImageUrl,

            };
            cell.Controls.Add(img);

            img.Click += ImgClick;

        }

        void ImgClick(object sender, ImageClickEventArgs e)
        {

            var img = sender as ImageButton;

            if (img == null) return;

            var row = (GridViewRow)img.NamingContainer;

            if (row == null) return;

            // get the id
            var id = row.Cells[1].Text;


            // raise an event
            OnClick(id);

        }

        protected virtual void OnClick(string id)
        {
            if (ImageClicked != null)
            {
                ImageClicked(this, id);
            }
        }

    }

}

我绑定事件的数据视图自定义控制代码：

protected override void OnDataBinding(EventArgs e)
{
    // create a new page because the Page object is null in this context
    var pg = new Page();

    var selectionColumn = new DataSearchGridImageColumn
    {
        ImageUrl = string.Format(
            "url({0})",
            pg.ClientScript.GetWebResourceUrl(GetType(), "WebControls.Images.search.png"))
    };


    Columns.Clear();
    Columns.Add(selectionColumn);
    Columns.Add(CreateColumn(ValueFieldName, ValueFieldName));
    Columns.Add(CreateColumn(TextFieldName, TextFieldName));

    AutoGenerateColumns = false;

    selectionColumn.ImageClicked += SelectionColumnImageClicked;

    base.OnDataBinding(e);

}

void SelectionColumnImageClicked(object sender, string value)
{
    if (RowSelected != null)

        RowSelected(this, value);
}

Answer 1

根据您的描述，您的父控件中的事件似乎会触发，但不会触发子控件中的事件，对吧？

看看这个site ...

Asp.net Web窗体事件未在嵌套控件的自定义控件中触发

1 个答案: