設置從代碼中的SQL selectparameter落後於gridview_rowdatabound

我建立下面這個例子在GridView編輯模式2個級聯dropdownlists但比C＃： http://mikepope.com/blog/DisplayBlog.aspx?permalink=1708 設置從代碼中的SQL selectparameter落後於gridview_rowdatabound

但我@AttriFk從來沒有得到一個值，我怎麼能在這個事件中設置？

<asp:TemplateField HeaderText="Sub Attribute"> 
    <EditItemTemplate> 
     <asp:DropDownList ID="ddlListSubAttributes" runat="server" AutoPostBack="True" DataSourceID="SqlDataSourceSubAttributes" DataTextField="Title" DataValueField="ID" /> 
     <asp:SqlDataSource ID="SqlDataSourceSubAttributes" runat="server" ConnectionString="Data Source="//empty for this post" ProviderName="System.Data.SqlClient" SelectCommand="SELECT [ID],[Title],[AttriFk] FROM [LocalGTPDatabase].[dbo].[AttributeSubTypes] WHERE ([AttriFk] = @AttriFk)"> 
       <SelectParameters> 
        <asp:Parameter Name="@AttriFk" /> 
       </SelectParameters> 
     </asp:SqlDataSource> 
    </EditItemTemplate> 
    <ItemTemplate> 
     <asp:Label ID="Label66" runat="server" Text='<%# Bind("subAttribute") %>'></asp:Label> 
    </ItemTemplate> 
</asp:TemplateField>

這背後是我的代碼的一部分：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
     { 
      if (e.Row.RowState == DataControlRowState.Edit) 
      { 
       System.Data.DataRowView dv = (System.Data.DataRowView)e.Row.DataItem; 

       DropDownList ddlListAttributes = (DropDownList)(e.Row.FindControl("ddlListAttributes")); 
       String nest = Convert.ToString(dv["AttributeFk"]); 
       ddlListAttributes.SelectedValue = nest; 
       //Databind list of taskCode in dependent drop-down list, preselect value 
       DropDownList ddlListSubAttributes = (DropDownList)(e.Row.FindControl("ddlListSubAttributes")); 
       SqlDataSource dsc = (SqlDataSource)(e.Row.FindControl("SqlDataSourceSubAttributes")); 

       String testing = Convert.ToString(dv["AttributeFk"]); 
       //This is not working 
       dsc.SelectParameters["@AttriFk"].DefaultValue = Convert.ToString(dv["AttributeFk"]); 

       //Than I tried this but still it isn't working: 
       dsc.SelectParameters.Add("@AttriFk", Convert.ToString(dv["AttributeFk"])); 

       ddlListSubAttributes.DataBind(); 
       ddlListSubAttributes.SelectedValue = Convert.ToString(dv["SubAttributeFk"]); 
      } 
     }

來源

2013-01-24 Jelle

我敢肯定的@是不是在參數名稱（將其保留在SQL SELECT命令允許雖然

。

因此改變

<asp:Parameter Name="@AttriFk" />

到

<asp:Parameter Name="AttriFk" />

來源

2013-01-24 14:31:42

非常感謝你，這確實是錯誤！ – Jelle

後續問題如果可能的話：爲什麼這段代碼不能正常工作：if（e.RowState == DataControlRowState.Edit）即使該行處於編輯模式，它也不會始終進入此行？ – Jelle

設置從代碼中的SQL selectparameter落後於gridview_rowdatabound

回答

相關問題