我有一个 Asp 服务器控制按钮,onClick
用于处理后面代码中的代码和onClientClick
处理 javascript 代码。代码是:
更新:根据 Icarus 解决方案,更新代码:
按钮来源:
<asp:Button ID="Button1" runat="server" onclick="Button1_Click"
style="z-index: 1; left: 648px; top: 202px; position: absolute"
Text="Show route" OnClientClick="droute(); return false" />
<asp:HiddenField ID="hdncroute" runat="server" />
后面的代码:
protected void Button1_Click(object sender, EventArgs e)
{
using (con = new MySqlConnection("server=localhost; uid=root;password=as64ws;database=Gmaps"))
da = new MySqlDataAdapter("select * from routes where uid='" + Session["uname"].ToString() + "'", con);
da.Fill(ds, "mroute");
foreach (DataRow r in ds.Tables[0].Rows)
{
uroute.Add(r["latlng"].ToString());
}
croute = new string[uroute.Count];
croute = uroute.ToArray();
hdncroute.Value = string.Join("&", croute);
}
Javascript函数:
function droute()
{
var route=[];
var temp;
temp = eval(document.getElementById('<%= hdncroute.ClientID %>').value);
route= temp.split('&');
//Polyline icon n line settings
var iconsetngs= {path:google.maps.SymbolPath.FORWARD_CLOSED_ARROW, fillColor:'#FF0000'};
var polylineoptns= {strokeColor:'#3333FF',strokeOpacity:0.8,strokeWeight:3,map:map,icons:[{icon:iconsetngs,offset:'100%'}]};
polyline= new google.maps.Polyline(polylineoptns);
//Loop to add locations and draw line
var path= polyline.getPath();
for(var i=0;i<route.length;i++)
{
var marker= new google.maps.Marker({position:route[i],map:map});
path.push(route[i]);
google.maps.event.addListener(marker,'click',showiwindow);
}
//Event Listener's
function showiwindow(event)
{
iwindow.setContent("<b>Coordinates are:</b><br/>Latitude:"+event.latLng.lat()+"<br/>Longitude:"+event.latLng.lng());
iwindow.open(map,this);
}
}
我知道编写return false
javascript 函数将避免刷新,并且 onClick 具有 void 返回类型。但是我的页面仍然会在按钮单击时重新加载。