找到ID的控件在GridView的动态添加模板场 [英] find a control by id from Dynamically added Template field in GridView

问题描述

您好我通过实现了Itemplate接口动态添加模板领域的GridView。
该模板field包含标签和文本框一些控制。我如何得到这些控件行数据绑定事件。

Hi i added template field dynamically to gridview by implementing ITemplate interface. The template field contains some controls like label and textboxes. how do i get these controls in row databound event.

我不能够得到当我这样做gridviewrow.findcontrol（ID），因为我通常当我们从ASPX页面添加模板列。

I am not able to get when i do gridviewrow.findcontrol("id") as i do normally when we add templatefield from aspx page.

我添加模板字段的方法是这样的。

The way i added template field is like this

公共类CustomGridViewColumn：了Itemplate
        {
            ListItemType _liType;
            串_columnName;

        public CustomGridViewColumn(ListItemType type, string column)
        {
            _liType = type;
            _columnName = column;

        }
        void ITemplate.InstantiateIn(System.Web.UI.Control container)
        {
            switch (_liType)
            {
                case ListItemType.Header:
                    Label lblHeader = new Label();
                    lblHeader.Text = _columnName;
                    container.Controls.Add(lblHeader);
                    break;
                case ListItemType.Item:
                    Label lblItem = new Label();
                    lblItem.DataBinding += new EventHandler(lbl_DataBinding);
                    lblItem.ID = "lbl" + _columnName;
                    lblItem.ClientIDMode = ClientIDMode.Predictable;
                    container.Controls.Add(lblItem);

                    DropDownList ddl = new DropDownList();

                    ddl.DataBinding += new EventHandler(ddl_DataBinding);
                    ddl.ID = "ddl" + _columnName;
                    ddl.Visible = false;
                    container.Controls.Add(ddl);
                    break;


            }
        }

}

现在我想访问我已经使用这个code添加标签和下拉列表。
当我做gridviewrow.findcontrol（ID）我没有得到他们。
任何一个可以帮助我。

Now i want access the label and dropdown which i have added using this code. when i do gridviewrow.findcontrol("id") i am not getting them. Can any one please help me.

我geeting当我经历的所有行，并尝试找到，但
我有一排一个复选框，当我选择它的所有标签应diappear和的DDL dhould出现
为了这个，我现在用的是follwoing code。

I am geeting when i go through all the rows and try to find but i have a check box in a row when i select it all labels should diappear and ddls dhould appear for this i am using the follwoing code.

保护无效chkEdit_CheckedChanged（对象发件人，EventArgs的发送）
 {
            复选框chkEditTest =（复选框）发送;
            GridViewRow成长=（GridViewRow）chkEditTest.NamingContainer;
            DropDownList的DDL =（DropDownList的）grow.FindControl（DDL）;
            标签LBL =（标签）grow.FindControl（LBL）;
}

当我这样做我不能够得到控制。
它似乎像控件disapppearing上回发。

when i do this i am not able to get the controls. it seems like controls are disapppearing on postback..

推荐答案

这是我想出了，我可以能够得到的code对照参考后面。

This is what I came up with and I can able to get the control reference in the code behind.

    public class CustomGridViewColumn : ITemplate
    {
    ListItemType _liType; string _columnName;

    public CustomGridViewColumn(ListItemType type, string column)
    {
        _liType = type;
        _columnName = column;

    }

    void ITemplate.InstantiateIn(Control container)
    {
        switch (_liType)
        {
            case ListItemType.Header:
                Label lblHeader = new Label();
                lblHeader.Text = _columnName;
                container.Controls.Add(lblHeader);
                break;
            case ListItemType.Item:
                Label lblItem = new Label();
                lblItem.DataBinding += new EventHandler(lblItem_DataBinding);
                lblItem.ID = "lbl" + _columnName;
                lblItem.ClientIDMode = ClientIDMode.Predictable;
                container.Controls.Add(lblItem);

                DropDownList ddl = new DropDownList();

                ddl.DataBinding += new EventHandler(ddl_DataBinding);
                ddl.ID = "ddl" + _columnName;
                ddl.Visible = false;
                ddl.DataSource = new string[] { "Hello", "World" };
                container.Controls.Add(ddl);
                break;


        }
    }

    void ddl_DataBinding(object sender, EventArgs e)
    {

    }

    void lblItem_DataBinding(object sender, EventArgs e)
    {

    }

}

 protected void Page_Load(object sender, EventArgs e)
 {

    DataTable dt = new DataTable();
    dt.Columns.Add("Name");
    DataRow oItem = dt.NewRow();
    oItem[0] = "Deepu";
    dt.Rows.Add(oItem);
    oItem = dt.NewRow();
    oItem[0] = "MI";
    dt.Rows.Add(oItem);
    GridView gv = new GridView();
    gv.ID = "myGridView";
    gv.AutoGenerateColumns = false;
    BoundField nameColumn = new BoundField();
    nameColumn.DataField = "Name";
    nameColumn.HeaderText = "Name";
    gv.Columns.Add(nameColumn);

    TemplateField TmpCol = new TemplateField();
    TmpCol.HeaderText = "Template Column";
    gv.Columns.Add(TmpCol);
    TmpCol.ItemTemplate = new CustomGridViewColumn(ListItemType.Item, "TEST");
    gv.DataSource = dt;
    gv.DataBind();
    Form.Controls.Add(gv);


}
protected void Button1_Click(object sender, EventArgs e)
{
    GridView gv = Form.FindControl("myGridView") as GridView;
    foreach (GridViewRow item in gv.Rows)
    {
        var ddl = item.FindControl("ddlTest") as DropDownList;
        if (ddl != null)
        {
            ddl.Visible = true;
        }

        var lbl = item.FindControl("lbl") as Label;
        if (lbl != null)
        {
            lbl.Text = "hello";
        }
    }
}

<form id="form1" runat="server">


<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />


</form>

感谢

Deepu

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