Question

我正在开发一个能够通过datagridview操作xml文件的GUI，并将其保存到用户选择的目的地。这个程序还有一个.exe.config文件，我也希望能够在datagridview中自由编辑，因为它比用户手动进入文件并相应地更改值更方便。

我已经尝试声明了一个数据集，我最初认为.exe.config文件只是一个xml文件，但是这段代码不起作用：

        dataSet1.ReadXml(configpath);
        bindingSource1.DataSource = dataSet1.Tables[0];
        dataGridView1.DataSource = bindingSource1;

当我运行它时，datagridview为空，我确认文件路径是正确的，并且在我调试代码时没有异常，而对于我在GUI中打开的其他xml文件，显示的数据完全正常。也许readxml（）只支持..合法的xml文件而不是xml配置文件？我尝试谷歌搜索并寻找一些答案，但我得到的只是通过手动访问xml文件和更改值（我已经知道的东西）更改设置的线程。我希望能够让用户做他们想要做的数据，然后保存它。 .exe.config设置也可能适用于其他程序，但它本质上是一个xml配置文件。我认为网络上没有太多关于这个特殊问题的原因，因为设置通常是静态的，如果它们被更改，手动操作非常容易。

总结一下，

我正在寻找一种能够打开任何 .exe.config文件的方法，在datagridview中显示它，允许用户能够操作里面的数据值，然后保存文件，覆盖以前的数据设置。

感谢任何帮助。提前谢谢！

tf.rz（.NET 3.5 SP1，Visual Studio 2008 C＃）

编辑：我将上传我创建的xml文件的一个工作示例：我希望程序能够导航到.exe.config文件，然后打开它并让它显示如下设置名称是列，值是在datagridview的单元格中。不幸的是，我不能在我的家用电脑上做到这一点。

Answer 1

这是我用来加载和操作配置文件的。您可能需要更改loadAppSettings和loadConnStrings方法以满足您的需求。

using System;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Xml;
using System.IO;


namespace GenericManagementClasses
{
    public class ConfigFile
    {
        private string m_ConfigFilePath;
        private XmlDocument m_XmlDoc;

        private FileStream fIn;
        private StreamReader sr;
        private StreamWriter sw;

        private OrderedDictionary m_AppSettings;
        private OrderedDictionary m_ConnectionStrings;

        private XmlNode m_AppSettingsNode;
        private XmlNode m_ConnectionStringsNode;

        #region "Properties"
        public String Path
        {
            get
            {
                return m_ConfigFilePath;
            }
        }

        public OrderedDictionary AppSettings
        {
            get
            {
                return m_AppSettings;
            }
        }

        public OrderedDictionary ConnectionStrings
        {
            get
            {
                return m_ConnectionStrings;
            }
        }
        #endregion
        #region "Constructors"
        /// <summary>
        /// Default constructor - declared private so that you can't instantiate an empty ConfigFile object
        /// <code>ConfigFile cfg = new ConfigFile()</code> will result in a NotImplemented exception
        /// </summary>
        private ConfigFile()
        {
            throw new NotImplementedException("No default constructor for the ConfigFile class");
        }
        /// <summary>
        /// Public constructor
        /// <example>ConfigFile cfg = new ConfigFile(@"c:\MyApp\MyApp.exe.config");</example>
        /// </summary>
        /// <param name="ConfigFilePath">The path to the configuration file</param>
        public ConfigFile(string ConfigFilePath)
        {
            //Check to see if the file exists
            if (File.Exists(ConfigFilePath)){
                //Initialise the XmlDocument to hold the config file
                m_XmlDoc = new XmlDocument();
                //Store the path to the config file
                m_ConfigFilePath = ConfigFilePath;

                //FileStream to get the contents out of the file
                fIn = new FileStream(m_ConfigFilePath, FileMode.Open, FileAccess.ReadWrite);
                //StreamReader to read the FileStream
                sr = new StreamReader(fIn);
                //StreamWriter to write to the FileStream
                sw = new StreamWriter(fIn);

                //Try and load the XML from the file stream
                try
                {
                    m_XmlDoc.LoadXml(sr.ReadToEnd());
                    m_AppSettingsNode = m_XmlDoc.GetElementsByTagName("appSettings")[0];
                    m_ConnectionStringsNode = m_XmlDoc.GetElementsByTagName("connectionStrings")[0];

                    loadAppSettings();
                    loadConnStrings();

                }
                catch (Exception ex)
                {
                    //If it went pear shaped, throw the exception upwards
                    throw ex;
                }

            }
            else
            //If the file doesn't exist, throw a FileNotFound exception
            {
                throw new FileNotFoundException(ConfigFilePath + " does not exist");
            }
        }
        #endregion

        private void loadAppSettings()
        {
            m_AppSettings = new OrderedDictionary();
            XmlNodeList nl = m_AppSettingsNode.SelectNodes("add");
            foreach (XmlNode node in nl)
            {
                m_AppSettings.Add(node.Attributes["key"].Value, node.Attributes["value"].Value);
            }
        }

        private void loadConnStrings()
        {
            m_ConnectionStrings = new OrderedDictionary();

            XmlNodeList nl = m_ConnectionStringsNode.SelectNodes("add");
            foreach (XmlNode node in nl)
            {
                m_ConnectionStrings.Add(node.Attributes["name"].Value, node.Attributes["connectionString"].Value);
            }
        }

        public void setAppSetting(string name, string newValue)
        {
            if (!m_AppSettings.Contains(name))
            {
                throw new Exception(String.Format("Setting {0} does not exist in {1}", name, m_ConfigFilePath));
            }
            else
            {
                m_AppSettings[name] = newValue;
                m_XmlDoc.SelectSingleNode(String.Format(@"//appSettings/add[@key='{0}']",name)).Attributes["value"].Value = newValue;
                fIn.SetLength(0);
                sw.Write(m_XmlDoc.InnerXml);
                sw.Flush();
            }

        }
        #region "Static Methods"
        /// <summary>
        /// Static method to return a ConfigFile object
        /// <example>ConfigFile cfg = ConfigFile.LoadConfigFile(@c:\MyApp\MyApp.exe.config");"</example>
        /// </summary>
        /// <param name="ConfigFilePath">Path to the configuration file to load</param>
        /// <returns></returns>
        public static ConfigFile LoadConfigFile(string ConfigFilePath)
        {
            return new ConfigFile(ConfigFilePath);
        }
        #endregion
    }
}

在datagridview中显示.exe.config文件并操作设置

1 个答案: