Question

我正在创建一个空数据行来绑定我的网格视图，但是，我总是得到“指定的强制转换无效”我的Checkbox错误消息

这是我的aspx：

 <asp:TemplateField HeaderText="Include In Food Bag" ItemStyle-Width="20%" ItemStyle-HorizontalAlign="Center" FooterStyle-HorizontalAlign="Center">
 <ItemTemplate>
    <asp:CheckBox runat="server" ID="ChkBxIncludeInFoodBag" Checked='<%# Bind("IncludeInFoodBag") %>' ></asp:CheckBox>
 </ItemTemplate>
 <FooterTemplate>
     <asp:CheckBox runat="server" ID="ChkBxIncludeInFoodBag"></asp:CheckBox>
 </FooterTemplate>
</asp:TemplateField>

这是我背后的代码：

protected void BindFoodBagItemsGridView()
    {
        DataTable FoodBagItems = BLFoodBagItem.GetAllFoodBagItems();

        if (FoodBagItems.Rows.Count > 0)
        {
            FoodBagItemsGridView.DataSource = BLFoodBagItem.GetAllFoodBagItems();
        }
        else
        {
           tempFoodItems = new DataTable();
           tempFoodItems.Columns.Add("FoodBagItemId");
           tempFoodItems.Columns.Add("ItemName");
           tempFoodItems.Columns.Add("ItemQuantity");
           tempFoodItems.Columns.Add("IncludeInFoodBag");
            DataRow dr = tempFoodItems.NewRow();
            dr["IncludeInFoodBag"] = bool.Parse("false");
             -- I also tried dr["IncludeInFoodBag"] = false;
             -- I also tried dr["IncludeInFoodBag"] = 0;
            tempFoodItems.Rows.Add(dr);
            FoodBagItemsGridView.DataSource = tempFoodItems;

        }

        FoodBagItemsGridView.DataBind();
    }

Answer 1

像这样添加你的专栏： -

tempFoodItems.Columns.Add("IncludeInFoodBag",typeof(bool));

您需要在将数据类型添加到DataTable时添加列的数据类型。

复选框指定的转换无效

1 个答案: