Question

点击我的aspx页面上的一个按钮，我正在生成一个.csv文件，可以在javascript dygraph中使用：

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table width="1024" align="center" cellpadding="0" cellspacing="0" border="0" class="wrapper">
  <tbody>
    <tr>
      <td width="1024" class="wrapper">
        <table width="25%" align="left" cellpadding="0" cellspacing="0" border="0" class="series">
          <tbody>
            <tr>
              <td align="center">
                <a target="_blank" class="editorLinks tooltip" style="color: #000000; text-decoration: none;">
                  <div>
                    <img src="../../car_2series.jpg" width="90" height="44" alt="2 Series" border="0" style="display: block;">
                  </div>
                  <h3 style="margin: 15px 0 45px; margin-top: 15px; margin-bottom: 45px; color: #030000;
                                    font-family: Helvetica,Arial,sans-serif; font-size: 0.9em;">
                                    Car A</h3>
                </a>
              </td>
            </tr>
          </tbody>
        </table>

        <table width="25%" align="left" cellpadding="0" cellspacing="0" border="0" class="series">
          <tbody>
            <tr>
              <td align="center">
                <a target="_blank" class="editorLinks tooltip" style="color: #000000; text-decoration: none;">
                  <div>
                    <img src="../../../feb2015/car_4series.jpg" width="90" height="44" alt="4 Series" border="0" style="display: block;">
                  </div>
                  <h3 style="margin: 15px 0 45px; margin-top: 15px; margin-bottom: 45px; color: #030000;
                                    font-family: Helvetica,Arial,sans-serif; font-size: 0.9em;">
                                    Car B</h3>
                </a>
              </td>
            </tr>
          </tbody>
        </table>

      </td>
    </tr>
  </tbody>
</table>

<table width="1024" align="center" cellpadding="0" cellspacing="0" border="0" class="wrapper">
  <tbody>
    <tr>
      <td width="1024" class="wrapper">
        <table width="25%" align="left" cellpadding="0" cellspacing="0" border="0" class="series">
          <tbody>
            <tr>
              <td align="center">
                <a target="_blank" class="editorLinks tooltip" style="color: #000000; text-decoration: none;">
                  <div>
                    <img src="../../car_6series.jpg" width="90" height="44" alt="6 Series" border="0" style="display: block;">
                  </div>
                  <h3 style="margin: 15px 0 45px; margin-top: 15px; margin-bottom: 45px; color: #030000;
                                    font-family: Helvetica,Arial,sans-serif; font-size: 0.9em;">
                                   Car B</h3>
                </a>
              </td>
            </tr>
          </tbody>
        </table>
        <table width="25%" align="left" cellpadding="0" cellspacing="0" border="0" class="series">
          <tbody>
            <tr>
              <td align="center">
                <a target="_blank" class="editorLinks tooltip" style="color: #000000; text-decoration: none;" data-title="1/100%">
                  <div>
                    <img src="../../../car_7series.jpg" width="90" height="44" alt="7 Series" border="0" style="display: block;">
                  </div>
                  <h3 style="margin: 15px 0 45px; margin-top: 15px; margin-bottom: 45px; color: #030000;
                                    font-family: Helvetica,Arial,sans-serif; font-size: 0.9em;">
                                    7 Series</h3>
                </a>
              </td>
            </tr>
          </tbody>
        </table>


      </td>
    </tr>
  </tbody>
</table>

稍后同样在同一个按钮点击事件中，我使用.csv作为源代码填写dygraph的javascript代码填充div容器（在protected void btn_start_Click(object sender, EventArgs e) { ..... System.IO.File.WriteAllText(MapPath("~/Data/") + authuser + "_data.csv", data);上为空）：

Page_Load

一切正常但有旧数据。例如，我第一次打开页面时，生成带有数据的.csv两周，dygraph保持为空。然后我在页面上生成数据3周，然后我会显示带有2周数据的dygraph。所以它始终采用旧数据。

那么我怎么能告诉javascript始终采用新生成的.csv而不是以前的会话中的旧的.csv？也尝试protected void btn_start_Click(object sender, EventArgs e) { ..... System.IO.File.WriteAllText(MapPath("~/Data/") + authuser + "_data.csv", data); ..... string strDiagram = @"<script type=""text/javascript""> chart = new Dygraph(document.getElementById(""MainContent_DivDiagramm""), 'http://webserver/test/Data/" + authuser + @"_data.csv',... //String reduced here ..... DivDiagramm.InnerHtml = strDiagram;，但结果相同。谢谢！

Answer 1

在JavaScript中访问CSV文件网址时，将某种版本控制查询字符串添加到其中，例如：

chart = new Dygraph(
    document.getElementById(""MainContent_DivDiagramm""), 
    'http://webserver/test/Data/" + authuser + @"_data.csv?v=" + DateTime.Now.Ticks.ToString() + "');"

单击具有实际值的按钮后，在aspx页面上运行javascript

1 个答案: