聽說讀寫

namespace Build
{
    #region namespace

    using System.Globalization;
    using System.IO;
    using System.Xml;
    using Microsoft.Build.Framework;
    using Microsoft.Build.Utilities;

    #endregion

    #region Standard Config File Sections

    /// <summary>
    /// this class generate config / xml file by template
    /// </summary>
    public class ConfigurationEnvironmentTask : Task
    {
        #region Public Propreties

        /// <summary>
        /// Gets or Sets template file path (full path : C:\web.config)
        /// </summary>
        [Required]
        public ITaskItem TemplateFile { get; set; }

        /// <summary>
        /// Gets or Sets traget file path, will automatic overwrite this file (full path : C:\web.config)
        /// </summary>
        [Required]
        public ITaskItem TargetFile { get; set; }

        /// <summary>
        /// Gets or Sets configuration file, will get settings from this path (full path : C:\web.config , relative path: dev.config)
        /// </summary>
        [Required]
        public ITaskItem DataSource { get; set; }

        #endregion

        /// <summary>
        /// execute replace logic
        /// </summary>
        /// <returns>ture successful, false failure</returns>
        public override bool Execute()
        {
            string templateContent = File.ReadAllText(this.TemplateFile.ToString());

            XmlDocument xmldoc = new XmlDocument();
            string fileName = null;
            string fileFolder = null;

            if (Path.IsPathRooted(this.DataSource.ToString()))
            {
                fileFolder = Path.GetDirectoryName(this.DataSource.ToString());
            }
            else
            {
                fileFolder = Path.GetDirectoryName(this.TargetFile.ToString());
            }

            fileName = Path.GetFileName(this.DataSource.ToString());
            if (fileName == null || string.IsNullOrEmpty(fileName) || fileName.ToLower(CultureInfo.CurrentCulture).Trim() == ".config")
            {
                fileName = @"local.config";
            }

            this.Log.LogMessage("DataSource:" + this.DataSource.ToString());
            this.Log.LogMessage("IsPathRooted:" + Path.IsPathRooted(this.DataSource.ToString()));
            this.Log.LogMessage("fileFolder:" + fileFolder);
            this.Log.LogMessage("fileName:" + fileName);

            if (!File.Exists(fileFolder + @"\" + fileName))
            {
                throw new FileNotFoundException("Can not find File :" + fileFolder + @"\" + fileName);
            }

            xmldoc.Load(fileFolder + @"\" + fileName);

            foreach (XmlNode node in xmldoc.SelectNodes("/Settings/*"))
            {
                templateContent = templateContent.Replace("$(" + node.Name + ")", node.InnerText).Trim(new char[] { ' ', '\r', '\n', '\t' });
            }

            File.WriteAllText(this.TargetFile.ToString(), templateContent);
            return true;
        }
    }

    #endregion Standard Config File Sections
}