DataGrid-利用imagebutton实现更新操作

说明:
本例中实现单击更新修改图标(imagebutton)时取得相应行的数据并填充到下面的panel容器中,这时panel的Visible为true,修改相应数据单击更新后隐藏下面的panel容器.
更新操作如下图所示:


步骤如下:
1.创建panel如图所示,具体就不用说了吧,需要在Page_Load事件中添加如下代码

设置panel的可见性为false
private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            if(!IsPostBack)
            {
                BindDG();
                this.Panel1.Visible=false;
            }
        }

2.在datagrid中创建模板列
3.在模板列中加入imagebutton并为其指定ImageUrl和CommandName,代码如下:

更新.aspx
<asp:TemplateColumn>
                                    <ItemTemplate>
                                        <asp:ImageButton id="Imagebutton2" runat="server" CommandName="UpDt" ImageUrl="../Pic/edit2.gif"></asp:ImageButton>
                                    </ItemTemplate>
                                </asp:TemplateColumn>

4.在datagrid的ItemCommand事件中添加如下代码

单击修改图标时触发
 private void DG_userinfo_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
        {
            if(e.CommandName=="Del")
            {
                string uid = e.Item.Cells[0].Text.ToString();
                string [] values = {uid};
                OperateXmlByDataSet.DeleteXmlRows(ViewState["filename"].ToString(),"userid",values);
                BindDG();

            }
            if(e.CommandName=="UpDt")
            {
                string userid = e.Item.Cells[0].Text.ToString();
                ViewState["uid"] = userid;
                this.Txt_id.Text = userid;
                this.Txt_name.Text = e.Item.Cells[1].Text.ToString();
                this.Txt_pass.Text = e.Item.Cells[2].Text.ToString();
                this.Txt_mail.Text = e.Item.Cells[3].Text.ToString();
                this.Txt_site.Text = e.Item.Cells[4].Text.ToString();
                this.Txt_msn.Text = e.Item.Cells[5].Text.ToString();
                this.Panel1.Visible=true;            
            }
        }

5."更新"按钮事件,我是用xml存储数据的,由于涉及代码较多,这里只给出部分源码,有想要的请留言

更新事件
 void Xml_UpDt(string userid)
        {
            string username = this.Txt_name.Text;
            string userpass = this.Txt_pass.Text;
            string usermail = this.Txt_mail.Text;
            string usersite = this.Txt_site.Text;
            string usermsn = this.Txt_msn.Text;

            string [] Columns = {"username","userpass","usermail","usersite","usermsn"};
            string [] ColumnsValues = {username,userpass,usermail,usersite,usermsn};
            OperateXmlByDataSet.UpdateXmlRow(ViewState["filename"].ToString(),Columns,ColumnsValues,"userid",userid);
        }

        private void Btn_update_Click(object sender, System.EventArgs e)
        {
            Xml_UpDt(ViewState["uid"].ToString());
            BindDG();
            this.Panel1.Visible=false;
        }