Question

我正在使用这个小代码片段来捕获具有某些参数的Java进程：

string query = "Select * From Win32_Process Where Name = 'javaw.exe'";
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
ManagementObjectCollection processList = searcher.Get();

foreach (ManagementObject obj in processList)
{
    string cmdLine = obj.GetPropertyValue("CommandLine").ToString();
    if (cmdLine.IndexOf("someapplication") != -1)
    {
        // ...
    }
}

这段代码就像几天前我没有SP1 for VS2010的魅力一样。现在它在第7行抛出一个空指针异常。我正在尝试为.NET Framework 2.0编译。

帮助！？：/

Answer 1

if (cmdLine != null && cmdLine.IndexOf("someapplication") != -1)

Answer 2

它可能与SP1关系不大，与Java更新有关。只需检查null：

string query = "Select * From Win32_Process Where Name = 'javaw.exe'";
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
ManagementObjectCollection processList = searcher.Get();

foreach (ManagementObject obj in processList)
{
    object cmdLineValue = obj.GetPropertyValue("CommandLine");

    if(cmdLineValue != null) {
        string cmdLine = cmdLineValue.ToString();
        if (cmdLine.IndexOf("someapplication") != -1)
        {
             // ...
        }
    }
}

Visual Studio 2010 SP1打破了什么？

2 个答案: