c# - 遍历 NewValues 集合并对所有内容进行 HTML 编码-6ren

c# - 遍历 NewValues 集合并对所有内容进行 HTML 编码

转载作者：行者123 更新时间：2023-11-30 22:42:06

我有一个 Gridview，我尝试遍历 NewValues 集合并对所有内容进行 HTML 编码。

我正在关注 MSDN CODE ....使用他们的代码(张贴在这里)我收到一个错误:

Collection was modified; enumeration operation may not execute.

我想问你一个完整的简单例子如何实现它，所以像我这样的初学者可以开始使用这个功能。PS:我发过类似的问题here人们回复了，但我仍然不明白，我需要一个简单的例子。

    <%@ Page language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void CustomersGridView_RowUpdating(Object sender, GridViewUpdateEventArgs e)
  {

    // Iterate through the NewValues collection and HTML encode all 
    // user-provided values before updating the data source.
    foreach (DictionaryEntry entry in e.NewValues)
    {

      e.NewValues[entry.Key] = Server.HtmlEncode(entry.Value.ToString());

    }

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView RowUpdating Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <h3>GridView RowUpdating Example</h3>

      <!-- The GridView control automatically sets the columns     -->
      <!-- specified in the datakeynames property as read-only.    -->
      <!-- No input controls are rendered for these columns in     -->
      <!-- edit mode.                                              -->
      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="true"
        autogenerateeditbutton="true"
        allowpaging="true" 
        datakeynames="CustomerID"
        onrowupdating="CustomersGridView_RowUpdating"  
        runat="server">
      </asp:gridview>

      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        updatecommand="Update Customers SET CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country WHERE (CustomerID = @CustomerID)"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>

    </form>
  </body>
</html>

最佳答案

object[] keys = (object[])Array.CreateInstance(typeof(object), e.NewValues.Count);
e.NewValues.Keys.CopyTo(keys, 0);

foreach (object key in keys)
{
    e.NewValues[key] = Server.HtmlEncode(e.NewValues[key].ToString());
}

关于c# - 遍历 NewValues 集合并对所有内容进行 HTML 编码，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/4592051/