Jquery+ajax请求data显示在GridView上(asp.net)

<script src="JS/jquery-1.4.2.js" type="text/javascript"></script> 
<script type="text/javascript"> 
function ShowProgressDiv() { 
var ID = $("input#idtxt").val(); 
$.ajax({ 
type: "GET", 
url: "GetGridViewByConditionForm.aspx", 
data: "id=" + ID, 
beforeSend: function() { 
$("div#ProgressDiv").css("display", "block"); 
}, 
success: function(msg) { 
$("div#ShowSearchResult").html(msg); 
}, 
complete: function() { 
$("div#ProgressDiv").css("display", "none"); ; 
} 
}); 
} 
</script> 
<form id="form1" runat="server"> 
<div> 
<input type="text" id="idtxt" name="idtxt" /> 
<input type="button" id="LoadBtn" value="LoadDataGridView" onclick="ShowProgressDiv()" /> 
</div> 
<div id="ProgressDiv" style="display:none"> 
<img alt="Loading" src="Images/ajax-loader.gif" />Loading...... 
</div> 
<div id="ShowSearchResult"> 
</div> 
</form>

protected void Page_Load(object sender, EventArgs e) 
{ 
if (Request["id"] != null) 
{ 
SqlConnection conn=null; 
SqlCommand cmd = null; 
SqlDataAdapter adapter = null; 
try 
{ 
conn = new SqlConnection(); 
conn.ConnectionString = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString; 
conn.Open(); 
cmd = new SqlCommand(); 
cmd.Connection = conn; 
cmd.CommandType = CommandType.Text; 
String cmdStr = "select * from dbo.Customers"; 
if (Request["id"].ToString()!=String.Empty) 
{ 
cmdStr += " where CustomerID= '" + Request["id"].ToString() + "'"; 
} 
cmd.CommandText = cmdStr; 
adapter = new SqlDataAdapter(cmd); 
DataSet ds = new DataSet(); 
adapter.Fill(ds); 
this.gvData.DataSource = ds; 
this.gvData.DataBind(); 
} 
catch 
{ 
Response.Write("Error happend!"); 
Response.Flush(); 
Response.End(); 
} 
finally 
{ 
if (adapter != null) 
{ 
adapter.Dispose(); 
} 
if (cmd != null) 
{ 
cmd.Dispose(); 
} 
if ((conn != null) && (conn.State == ConnectionState.Open)) 
{ 
conn.Close(); 
} 
} 
} 
}