我有这个ASP.NET AJAX工具包。每次触发AJAX时,我都会获得旧数据+新数据,并且它会不断添加和添加(因为我后面的代码中有+ =)如何解决这个问题,以便AJAX只显示更新后的版本,而不是不断添加?
ASPX:
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Timer ID="Timer1" runat="server" Interval="1000"></asp:Timer>
<ul id="myaspajaxtoolkit" runat="server"></ul>
</ContentTemplate>
</asp:UpdatePanel>
代码背后的代码:
SqlConnection cnn = new SqlConnection("Initial Catalog=Northwind;Data Source=localhost;Integrated Security=SSPI;");
protected void Page_Load(object sender, EventArgs e)
{
cnn.Open();
SqlCommand cmd = new SqlCommand("SELECT EmployeeName FROM Employees", cnn);
SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
myaspajaxtoolkit.InnerHtml += "<li>" + dr.GetString(0) + "</li>";
}
}
cnn.Close();
}
答案 0 :(得分:2)
string html = string.Empty;
if (dr.HasRows)
{
while (dr.Read())
{
html+= "<li>" + dr.GetString(0) + "</li>";
}
}
myaspajaxtoolkit.InnerHtml = html;