Google 可视化在 AJAX Control Toolkit Tab Control 中很小 [英] Google visualization is small inside AJAX Control Toolkit Tab Control

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本文介绍了Google 可视化在 AJAX Control Toolkit Tab Control 中很小的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试在 asp.net AJAX Toolkit Tab Control 中使用 google 可视化、柱形图，但我遇到了一些小(字面意思)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，条形图会正确显示，但是，如果我将相同的控件添加到另一个选项卡并重新加载页面，当我单击另一个选项卡时，控件已显示，但它很小且无法使用.

以下是说明问题的 test.aspx 页面的一些代码:

<%@ 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', {包:['columnchart'] });<script type="text/javascript">函数 drawVisualization() {//创建并填充数据表.var data = new google.visualization.DataTable();data.addColumn('string', 'Name');data.addColumn('数字', '高度');数据.addRows(3);data.setCell(0, 0, '童宁亩');data.setCell(1, 0, '黄昂发');data.setCell(2, 0, '腾努');data.setCell(0, 1, 174);data.setCell(1, 1, 523);data.setCell(2, 1, 86);//创建并绘制可视化.新的 google.visualization.ColumnChart(document.getElementById('visualization1')).绘制(数据，空)；新的 google.visualization.ColumnChart(document.getElementById('visualization2')).绘制(数据，空)；}google.setOnLoadCallback(drawVisualization);<身体><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"><内容模板><div id="visualization1" style="width: 300px; height: 300px;">

</内容模板></cc1:TabPanel><cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel2"><内容模板><div id="visualization2" style="width: 300px; height: 300px;">

</内容模板></cc1:TabPanel></cc1:TabContainer>

</表单>

解决方案

好的，我没有收到对这篇文章的单一回复，所以这里是我解决这个问题的方法，希望对某人有所帮助.

我从来没有真正了解过这个问题的根源，但我发现如果我将可视化的加载延迟到包含它的选项卡被点击，那么问题就会消失.

在 TabControl 中，我调用 JavaScript 函数以在单击时加载选项卡可视化:

<cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel1"><内容模板><div id="visualization1" style="width: 300px; height: 300px;"></div></内容模板></cc1:TabPanel><cc1:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel2"><内容模板><div id="visualization2" style="width: 300px; height: 300px;"></div></内容模板></cc1:TabPanel></cc1:TabContainer>

JavaScript 函数

function tabChanged(sender, args) {var ActiveTab = sender.get_activeTabIndex();如果 (sender.get_activeTabIndex() == 0) {如果(tab0Loaded ！= 真){//加载可视化新的 google.visualization.ColumnChart(document.getElementById('visualization2')).draw(data, null);tab0Loaded = true}}如果 (sender.get_activeTabIndex() == 1) {如果(tab1Loaded ！= true){//加载可视化新的 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一个包含可视化的标签，那么我会加载它.

I'm trying to use a google visualisation, the column chart, inside an asp.net AJAX Toolkit Tab Control, but I'm having small (literally) problems.

If I add the visualisation to the tab that's displayed by default when the page loads, the bar chart displays correctly, however, if I add the same control to another tab and reload the page, when I click on the other tab, the control is displayed, but its tiny and unusable.

Here's some code for a test.aspx page that illustrates the problem:

<%@ 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>

解决方案

Ok, I didn't get a single response to this post so here is how I worked around the problem, hope it helps someone.

I never actually got the the root of this problem but I found that if I delayed the loading of the Visualisations till the tab that contains it is clicked then the problem goes away.

In the TabControl I call a JavaScript function to load the tabs visualisation when clicked:

<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>

The JavaScript function

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
            }
        }

 }

During postback the active tab could change, to cope with this I have a JavaScript function that executes when the page loads, if the current active tab is one containing a visualisation then I load it.

这篇关于Google 可视化在 AJAX Control Toolkit Tab Control 中很小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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