Question

   protected void Page_Load(object sender, EventArgs e)
    {
        OpenFileLogic logic = new OpenFileLogic();
        DeliverySheetDetail deliverySheet = null;
        if(filename == OpenFileCommonCode.CREATED_FROM_BILL)
        {
            deliverySheet = logic.getBillFile_DeliveryEdit(code);
            TbCreateDate.Text = deliverySheet.CreateDate;
            TbTitle.Text = deliverySheet.Title;
            TbSpecialNote.Text = deliverySheet.SpecialNote;
            GridDeliverablesSheets.DataSource = deliverySheet.WorkDetails;
            GridDeliverablesSheets.DataBind();
        }
    }
  protected void GridDeliverablesSheets_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        OpenFileLogic logic =new OpenFileLogic();
        if(e.Row.RowType ==DataControlRowType.DataRow )
        {
          DropDownList ddlNumberUnit = (DropDownList) e.Row.FindControl("DdlNumberUnit") ;
                ddlNumberUnit.DataSource = logic.getNumberUnitData();                          
                ddlNumberUnit.DataTextField = "Name";
                ddlNumberUnit.DataValueField = "Code";
                ddlNumberUnit.DataBind();                                   
        }
    }
  public List<NumberUnit> getNumberUnitData()
    {
        List<NumberUnit> nUnit = new List<NumberUnit>();
        using (DBAccess dbaccess = new DBAccess())
        {
            dbaccess.OpenConnection();
            nUnit = dbaccess.GetNumberUnit();
        }
        return nUnit;
    }
    <ItemTemplate>
       <asp:TextBox style="text-align:right" ID="TbQuantity" Width="40px"   runat="server" Text='<%# Bind("Quantity") %>' />
       <asp:DropDownList ID="DdlNumberUnit" runat="server">
       </asp:DropDownList>
    </ItemTemplate>

在这段代码中，我显示了DropDown列表值，我从getNumberUnitData（）方法获取了这些值。但是，当我想将特定数据加载到gridview时，我无法做到这一点。在Page_Load方法中，delivery.WorkDetails包含我想在DropDown列表中显示的“Data”对象。

Answer 1

我想也许你需要添加POSTBACK

protected void Page_Load(object sender, EventArgs e)
{
   if(!Page.IsPostBack) {
     // First time to run your code
   }
}

Answer 2

object  NumberUnitData = DataBinder.Eval(e.Row.DataItem, "Data");

                if (NumberUnitData == null)
                {
                    ddlNumberUnit.SelectedItem.Text = "";
                }
                else
                {
                    ddlNumberUnit.SelectedItem.Text = NumberUnitData.ToString();
                }

我在ddlNumberUnit.DataBind（）下面添加了这段代码;它奏效了。

在Gridview中编辑DropDownList

2 个答案: