我正在尝试使用谷歌可视化,柱形图,在asp.net AJAX工具包标签控件中,但我有小(字面上)问题。
如果我将可视化添加到页面加载时默认显示的选项卡,则条形图会正确显示,但是,如果我将同一控件添加到另一个选项卡并重新加载页面,当我单击其他选项卡时,显示控件,但很小且无法使用。
以下是test.aspx页面的一些代码,用于说明问题:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="TestProject._Default" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<script type="text/javascript" src="http://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1', { packages: ['columnchart'] });
</script>
<script type="text/javascript">
function drawVisualization() {
// Create and populate the data table.
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn('number', 'Height');
data.addRows(3);
data.setCell(0, 0, 'Tong Ning mu');
data.setCell(1, 0, 'Huang Ang fa');
data.setCell(2, 0, 'Teng nu');
data.setCell(0, 1, 174);
data.setCell(1, 1, 523);
data.setCell(2, 1, 86);
// Create and draw the visualizations.
new google.visualization.ColumnChart(document.getElementById('visualization1')).
draw(data, null);
new google.visualization.ColumnChart(document.getElementById('visualization2')).
draw(data, null);
}
google.setOnLoadCallback(drawVisualization);
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<div>
<cc1:TabContainer ID="TabContainer1" runat="server">
<cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel1">
<ContentTemplate>
<div id="visualization1" style="width: 300px; height: 300px;">
</div>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel2">
<ContentTemplate>
<div id="visualization2" style="width: 300px; height: 300px;">
</div>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
</div>
</form>
</body>
</html>
答案 0 :(得分:0)
好的,我没有收到这篇文章的回复,所以这就是我如何处理这个问题,希望它对某人有帮助。
我从来没有真正得到这个问题的根源,但我发现如果我延迟加载Visualisations直到包含它的标签被点击,那么问题就会消失。
在TabControl中,我调用JavaScript函数在单击时加载选项卡可视化:
<cc1:TabContainer ID="TabContainer1" runat="server" OnClientActiveTabChanged="tabChanged">
<cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel1">
<ContentTemplate>
<div id="visualization1" style="width: 300px; height: 300px;"></div>
</ContentTemplate>
</cc1:TabPanel>
<cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel2">
<ContentTemplate>
<div id="visualization2" style="width: 300px; height: 300px;"></div>
</ContentTemplate>
</cc1:TabPanel>
</cc1:TabContainer>
JavaScript函数
function tabChanged(sender, args) {
var ActiveTab = sender.get_activeTabIndex();
if (sender.get_activeTabIndex() == 0) {
if (tab0Loaded != true) {
//load the visualisation
new google.visualization.ColumnChart(document.getElementById('visualization2')).draw(data, null);
tab0Loaded = true
}
}
if (sender.get_activeTabIndex() == 1) {
if (tab1Loaded != true) {
//load the visualisation
new google.visualization.ColumnChart(document.getElementById('visualization2')).draw(data, null);
tab1Loaded = true
}
}
}
在回发期间,活动标签可能会发生变化,为了解决这个问题,我有一个在页面加载时执行的JavaScript函数,如果当前活动标签是包含可视化的标签,那么我加载它。