Full-house

这两天老老大在泰国，我做的POP系统需要让我增加两个功能，其中就用到了在Gridview编辑状态下控件绑定数据库的问题，查询了相关资料后终于搞定了。将主要的代码写在这里，记录一下。

主要就是一个：
e.Row.RowState == DataControlRowState.Edit ||
            e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit
我觉得主要是用来判断Gridview的行的状态，之前没有加这个条件，所以一直是没有绑定到对象之类的错误提示。 

主要的代码：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    //判断是否是DataRow，以防止鼠标经过Header也有效果
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //行的状态是： 编辑状态 或者 （交替行且是编辑状态）
        if (e.Row.RowState == DataControlRowState.Edit ||
            e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit)
            )
        {
            //下面是绑定CheckBoxList,根据Gridview中的显示的值，更改CheckBoxList的选中状态
            Label lab = (Label)e.Row.FindControl(“TxtPrinter”);
            CheckBoxList chk = (CheckBoxList)e.Row.FindControl(“OperatorList”);                   
            string txtPrinter = lab.Text;
            if (txtPrinter != “”)
            {
                for (int i = 0; i < chk.Items.Count; i++)
                {
                    if (txtPrinter.IndexOf(chk.Items[i].Text.ToString()) >= 0)
                    {
                        chk.Items[i].Selected = true;
                    }
                }
            }
            //下面是绑定DropDownList，根据Gridview Cells中显示的内容查找数据库，如果存在相关信息就显示DropDownList,并绑定
            DropDownList printroll = (DropDownList)e.Row.FindControl(“PrintRollList”);
            TextBox txt_printroll = ((TextBox)e.Row.FindControl(“txtPrintroll”));
            BLL.printroll bll = new BLL.printroll();
            string pid = bll.GetID(txt_printroll.Text.Trim());
            if (pid == “–”)
            {
                printroll.Visible = false;
            }
            else
            {
                DataTable dt = bll.GetChildList(Convert.ToInt32(pid));
                if (dt.Rows.Count != 0)
                {
                    printroll.DataSource = dt;
                    printroll.DataTextField = dt.Columns["printroll"].ToString();
                    printroll.DataValueField = dt.Columns["printroll"].ToString();
                    printroll.DataBind();

                    printroll.Items.Insert(0, “–PrintRoll–”);
                    printroll.Items[0].Value = “0″;
                    printroll.Visible = true;
                }
            }                   
        }
    }

}