在GridView中使用FindControl（2） 

最近项目中用到FindControl和GridView，整理了一下几种使用方法，留作资料。  
  
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>

 

posted on 2013-09-10 19:04  YoungPop_Chen  阅读(172)  评论(0)  编辑  收藏  举报

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