我有大约10个下拉列表控件被填充。我想以编程方式创建它们,而不是复制/粘贴和修改每个字段。可以这样做吗?
以下是他们中的一个。我想以编程方式添加10个下拉列表控件及其各自的SqlDataSource控件。
<asp:SqlDataSource ID = "ddlDAGender" runat=server
ConnectionString="<%$ ConnectionStrings:test1ConnectionString %>"
SelectCommand = "select GenderID,Gender from mylookupGender"
>
</asp:SqlDataSource>
<asp:Label ID="Label3" runat="server" Text="Gender"></asp:Label>
<asp:DropDownList ID="ddlGender" runat="server"
DataSourceid="ddlDAGender"
DataTextField="Gender" DataValueField="GenderID"
>
</asp:DropDownList>
答案 0 :(得分:11)
您始终可以动态创建控件。但是在这种情况下,如果你的所有下拉列表都不同,我不确定它能为你节省一些东西,因为你仍然需要为它们分配个人ID和数据源。
以下是代码的外观:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindDropDownLists();
}
}
protected void Page_Init(object sender, EventArgs e)
{
SqlDataSource sqlDS = new SqlDataSource();
sqlDS.ConnectionString = ConfigurationManager.ConnectionStrings[0].ToString();
sqlDS.SelectCommand = "select GenderID,Gender from mylookupGender";
form1.Controls.Add(sqlDS);
DropDownList ddl = new DropDownList();
ddl.ID = "dddlGender";
ddl.DataSource = sqlDS;
ddl.DataTextField = "Gender";
ddl.DataValueField = "GenderID";
form1.Controls.Add(ddl);
// ... Repeat above code 9 times or put in a for loop if they're all the same...
}
private void BindDropDownLists()
{
foreach (Control ctl in form1.Controls)
{
if (ctl is DropDownList)
{
(ctl as DropDownList).DataBind();
}
}
}