在GridView中使用FindControl

来源：互联网发布：python可视化开发工具编辑：程序博客网时间：2024/05/19 22:59

1、在选择（SelectedIndexChanged）事件中使用

     //获得被选择行的TextBox1
    protected void gv1_SelectedIndexChanged(object sender, EventArgs e)
    {
        //Control c = this.gv1.Rows[this.gv1.SelectedIndex].FindControl("TextBox1");
        //TextBox tb = (TextBox)c;
        //tb.Text = "TextBox";

        TextBox tb = (TextBox)this.gv1.Rows[this.gv1.SelectedIndex].FindControl("TextBox1");
        tb.Text = "hello";
    }

2、在编辑行（RowEditing）事件中使用

    //编辑行时，找到TextBox1
    protected void gv1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        //设置要编辑行的索引
        gv1.EditIndex = e.NewEditIndex;
        GridViewBind();

        TextBox tb = (TextBox)this.gv1.Rows[e.NewEditIndex].FindControl("TextBox1");
        Response.Write(tb.Text);
    }

3、在取消编辑行（RowCancelingEdit）事件中使用

    //取消编辑时，找到TextBox1
    protected void gv1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        TextBox tb = (TextBox)this.gv1.Rows[e.RowIndex].FindControl("TextBox1");
        Response.Write(tb.Text);

        gv1.EditIndex = -1;
        GridViewBind();
    }

4、在行绑定（RowDataBound）事件中使用

    //获得行数据绑定中的TextBox1
    protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        // 对于在RowDataBound中Find,可以用if (e.Row.RowType == DataControlRowType.DataRow)来限制Find的范围,因为Find默认是在HeaderTemplate中找,如果不限定范围,在HeaderTemplate中找不到,自然就返回null,然后就出错了,DataControlRowType枚举中的DataRow确定是数据行.
        //if (e.Row.RowType == DataControlRowType.DataRow)
        //{
        //    TextBox tb = (TextBox)e.Row.FindControl("TextBox1");
        //    tb.Text = "databind";
        //}

//如果在DataGrid的页眉和页脚：

        //if (e.Row.RowType == DataControlRowType.Header)
        //{
        //    TextBox tbheader = (TextBox)e.Row.FindControl("txtHeader");
        //    tbheader.Text = "Head";
        //}
        ((TextBox)this.gv1.Controls[0].Controls[0].FindControl("txtHeader")).Text = "Head";

        if (e.Row.RowType == DataControlRowType.Footer)
        {
            TextBox tbfooter = (TextBox)e.Row.FindControl("txtFooter");
            tbfooter.Text = "Footer";
        }
    }

5、在行命令（RowCommand）事件中使用

    //行命令时间中找到TextBox1
    //如果使用GridView默认的模式,e.CommandArgument自动棒定为该行的Index,这时候只要指定gridview1.Rows[Convert.ToInt32(e.CommandArgument)].FindControl("xxx")就可以了,但是如果转化为Template,e.CommandArgument并不会自动绑定任何值,需要手动绑定,可以在<ItemTemplate></ItemTemplate>手动写CommandArgument="<%# ((GridViewRow) Container).RowIndex %>",把这个行的 Index绑定绑定到该e.CommandArgument就可以了.
    protected void gv1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName.ToLower() == "change")
        {
            TextBox tb = (TextBox)this.gv1.Rows[Convert.ToInt32(e.CommandArgument)].FindControl("TextBox1");

            Response.Write(tb.Text);
        }
    }

其他事件中的使用，和上面列举的类似

附上，前台代码:UseTest3.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UseTest3.aspx.cs" Inherits="UseTest3" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="gv1" runat="server" AutoGenerateColumns="False" OnSelectedIndexChanged="gv1_SelectedIndexChanged" OnRowEditing="gv1_RowEditing" OnRowDataBound="gv1_RowDataBound" ShowFooter="True" OnRowCommand="gv1_RowCommand" DataKeyNames="employeeid" OnRowCancelingEdit="gv1_RowCancelingEdit">
        <Columns>
        <asp:TemplateField>
            <HeaderTemplate>
                <asp:TextBox ID="txtHeader" runat="Server"></asp:TextBox>
            </HeaderTemplate>
            <ItemTemplate>
                <asp:TextBox ID="TextBox1" Text='<%# Bind("employeeid")%>' runat="server"></asp:TextBox>
            </ItemTemplate>
            <FooterTemplate>
                <asp:TextBox ID="txtFooter" runat="server"></asp:TextBox>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="lastname" HeaderText="LastName" />
        <asp:BoundField DataField="firstname" HeaderText="FirstName" />
        <asp:ButtonField CommandName="select" Text="选择" />
        <asp:ButtonField CommandName="change" Text="change" />
            <asp:CommandField ShowEditButton="True" />
        </Columns>
        </asp:GridView>
         </div>
    </form>
</body>
</html>