Question

我有一个html控件select

 <select id="Select1" runat="server" name="D1">
    <option></option>
 </select>

如何使用SQL Server或C#填充JavaScript/jQuery/JSON数据库中的数据？

请不要发布关于如何填充asp:DropDownList的答案，因为我已经知道如何操作，我必须使用select控件。

Answer 1

ASPX：

  <select id="Select1" runat="server" name="D1">

  </select>

代码背后的代码：

protected void Page_Load(object sender, EventArgs e)
{
   if (!IsPostBack)
   {
      string ConnectString = "server=localhost;database=pubs;integrated security=SSPI";
      string QueryString = "select * from authors";

      SqlConnection myConnection = new SqlConnection(ConnectString);
      SqlDataAdapter myCommand = new SqlDataAdapter(QueryString, myConnection);
      DataSet ds = new DataSet();
      myCommand.Fill(ds, "Authors");

      Select1.DataSource = ds;
      Select1.DataTextField = "au_fname";
      Select1.DataValueField = "au_fname";
      Select1.DataBind();
   }
}

Answer 2

function GetItems() {

var items;

    $.getJSON("/api/MethodName/" + id(Optional), function (data) {
        $.each(data, function (key, val) {
            items += "<option value='" + val.id+ "'>" + val.value+ "</option>";    
        });

        var header = '<option value=\'\'>Select...</option>';
        $('#Select1').html(header + items);
    });

};

你可以使用asp.net webapi for json，它非常简单快捷

Answer 3

您可以在ajax中使用json，但必须使用某些Web服务从服务器返回json。

$.ajax({
   url:'/path/to/webservice/method',
   type:'POST',
   dataType: 'json',
   success: function(data){
       $.each(data, function(i, item){
          $('<option value="'+item.val+'">'+item.text+'</option>').appendTo('#Select1');
       });
   },
   error: function(){
      console.log('err')
   }
});

Answer 4

在代码背后：

 string options = string.Empty; 
 using (SqlConnection sql_conn = new SqlConnection(ConfigurationManager.ConnectionStrings["connstr"].ToString()))
        {
            SqlDataAdapter sql_adapter = new SqlDataAdapter("select Value, Name from YourTable", sql_conn);
            DataSet ds = new DataSet();
            sql_adapter.Fill(ds, "TempTable");

            foreach (DataRow row in ds.Tables["TempTable"].Rows)
            {
                options = "<option value='" + row["Value"] + "'>" + row["Name"] + "</option>";
            }
            sql_conn.Close();
           return options;
        }

然后你可以使用jquery：

$.get(url, function (data) {        
        $('#Select1').html(data);
    });

Answer 5

您可以使用转发器

<select>
<asp:Repeater ID="Repeater1" runat ="server" DataSourceID="SqlDataSource1">
    <ItemTemplate>
        <option value='<%# Eval("ID")%>'> <%# Eval("ITEMNAME")%></option>
    </ItemTemplate>
</asp:Repeater>
</select>

Answer 6

            using (SqlConnection con = new SqlConnection("Data Source = [HostName]; Initial Catalog = CustomerOrders; Integrated Security = true"))
            {
                SqlCommand cmd = new SqlCommand("SELECT Name FROM Customer", con);
                con.Open();

                dropDownList.DataSource = cmd.ExecuteReader();
                dropDownList.DataTextField = "Name";
                dropDownList.DataValueField = "Name";
                dropDownList.DataBind();
            }

如何在asp.net中填充数据库中的“select”

6 个答案: