DataBind下拉列表和数据库中转发器内的文本框

时间:2015-01-03 15:43:47

标签: c# asp.net

我在Repeater中有一个文本框和一个DropDownList。我想在TextBox和DropDownList中填充数据库中的值。在PageLoad中,我有CategoryList.GetList,即:

SELECT ID, Name, ActiveName, ActiveID 
FROM category

我在该表中有10个值,而CategoryList.GetList返回的数据表的值与下面的值类似:

1, 'A', 'Active',   1
2, 'B', 'Active',   1
3, 'C', 'Inactive', 0 
4, 'D', 'Active',   1

现在我需要将值绑定到文本框和DropDownList。含义' A'需要在TextBox和' Active'在DropDownList中。我希望DropDownList的值只有' Active'或者'无效'。当我运行下面的代码时,我看到DropDownList多次包含Active和Inactive。你可以帮我避免这种情况,DropDownList中只有唯一的值吗?感谢

    <asp:Repeater ID="rpt" runat="server" OnItemDataBound="ca_temDataBound">
        <ItemTemplate>
            <tr>
                <td style="width: 35%; text-align: left">
                    <asp:TextBox ID="NameTextBox" runat="server" Width="230px" Text='<%#Eval("CategoryName")%>' />
                </td>
                <td style="width: 35%; text-align: left">
                    <asp:DropDownList ID="Active" runat="server" Width="80px" />
                </td>
                <asp:HiddenField runat="server" Value='<%# Eval("ID") %>' ID="IDHiddenField" />
            </tr>
        </ItemTemplate>
    </asp:Repeater>

代码背后:

    protected void Page_Load(object sender, EventArgs e)
    {         
        if (!IsPostBack)
        {
            rpt.ItemDataBound += new RepeaterItemEventHandler(ca_ItemDataBound);

            rpt.DataSource = CategoryList.GetList(1, 100); // Gets id, name, activeid and activename (activeid and active name are the text and value fields for dropdownlist )
            rpt.DataBind();
        }
    } 

    protected void Category_ItemDataBound(object source, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item | e.Item.ItemType == ListItemType.AlternatingItem)
        {
            DropDownList ddl = (DropDownList)e.Item.FindControl("ActiveDropDown");
            ddl.DataSource = CategoryList.GetList(1, 100); // Gets id, name, activeid and activename for the dropdownlist
            ddl.DataBind();     
        }
    }

    public static ReadOnlyCollection<Category> GetList(int pageIndex, int pageSize)
    {
        DataTable dataTable = CategoryDB.GetData(pageIndex, pageSize);

        List<Category> list = new List<Category>();

        foreach (DataRow dataRow in dataTable.Rows)
        {
            list.Add(new Category(
            dataRow["categoryID"].ToString(),
            dataRow["categoryName"].ToString(),
            dataRow["activeID"].ToString(),
            dataRow["activeName"].ToString()));
        }

        return new ReadOnlyCollection<Category>(list);
    }

2 个答案:

答案 0 :(得分:0)

我想我得到了你的问题:
好的,我将使用SQL查询解释:

"SELECT id, name, activeid,activename FROM categorylist"

所以用数据绑定填充下拉列表只需添加:

    foreach(var item in  CategoryList.GetList(1, 100))
    {
          dd1.Items.Add(new ListItem("text","Value");
    }

从项目中获取文本和值 或者,如果您愿意,也可以使用数据集 如果您需要有关数据集的任何帮助,请将数据库类型发送给我 希望它有所帮助

答案 1 :(得分:0)

如果您想要DropDownList内的静态项目,则不必绑定它。所以改成它:

<asp:DropDownList ID="Active" runat="server" Width="80px">
    <asp:ListItem Value="1" Text="Active" />
    <asp:ListItem Value="0" Text="Inactive" />
</asp:DropDownList>

在后面的代码中更改您的Category_ItemDataBound方法,如下所示:

protected void Category_ItemDataBound(object source, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item | e.Item.ItemType == ListItemType.AlternatingItem)
    {
        Category ct = (Category)e.Item.DataItem;
        DropDownList ddl = (DropDownList)e.Item.FindControl("Active");
        ddl.SelectedValue = ct.ActiveID.ToString(); // I don't know if this is the right property. 
    }
}