OnButtonClick在特定位置重复指定代码
本文关键字:代码 位置 定位 OnButtonClick | 更新日期: 2023-09-27 18:28:55
标题很好地解释了它,但为了冗余起见。我正在尝试点击一个按钮,在页面上生成代码(当然是定义的代码)。
protected void AddButton_Click(object sender, EventArgs e)
{
}
我希望它生成的代码将添加2个下拉列表,这些下拉列表将自动递增它生成的下拉列表ID的1,它还需要在数据库中基于SQL查询创建一个表。
<asp:DropDownList ID="DropDownList" runat="server" AppendDataBoundItems="True" DataSourceID="box_1" DataTextField="box_1" ToolTip="Checkbox #1" AutoPostBack="True" OnSelectedIndexChanged="DropDownList_SelectedIndexChanged">
<asp:ListItem Text="--Select One--" Value="" />
</asp:DropDownList>
编辑
protected void AddButton_Click(object sender, EventArgs e)
{
int a = 0;
string x = dropdowncounter.Value;
a = Convert.ToInt16(x);
a = a + 1;
dropdowncounter.Value = a.ToString();
DropDownList DropDownList1 = new DropDownList(){
// Set the DropDownList's Text and ID properties.
Text = "DropDownList",
ID = "DropDownList" + a.ToString(),
DataSourceID = "Box_1",
DataTextField = "box_1",
ToolTip = "Check Box Added!"
};
//addoptions1 = DropDownList1;
//addoptions.Controls.Add(myDropDownList);
//// Add a spacer in the form of an HTML <br /> element.
//addoptions.Controls.Add(new LiteralControl("<br />"));
}
这就是我到目前为止所拥有的,我觉得我已经接近了我所需要的功能(尽管我没有看到任何新的下拉框正在制作中。)。有什么帮助吗?
protected void AddButton_Click(object sender, EventArgs e)
{
int count = DropDownList.Items.Count + 1;
DropDownList.Items.Add(count.ToString(),count.ToString());
}
这是你想要的吗?
这就是您需要的吗?
SqlConnection con = new SqlConnection(s);
SqlCommand cmd = new SqlCommand("select FieldName from TableName", con);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
sda.Fill(ds);
DropDownList1.DataSource = ds;
DropDownList1.DataTextField = "FieldName";
DropDownList1.DataValueField = "FieldName";
DropDownList1.DataBind();