C#實現windows服務安裝，服務名可配置時出問題（無法創建 ProjectInstaller 安裝程序類型的實例）

 【參考資料】Windows 安裝服務 的兩種方式

一、問題出在System.Configuration.ConfigurationManager.AppSettings[""].ToString()無法讀取 config文件配置

 二、ProjectInstaller.Designer.cs源碼

using System.Xml;

namespace ServiceHost
{
    partial class ProjectInstaller
    {
        /// <summary>
        /// 必需的設計器變量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary> 
        /// 清理所有正在使用的資源。
        /// </summary>
        /// <param name="disposing">如果應釋放托管資源，為 true；否則為 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region 組件設計器生成的代碼

        /// <summary>
        /// 設計器支持所需的方法 - 不要修改
        /// 使用代碼編輯器修改此方法的內容。
        /// </summary>
        private void InitializeComponent()
        {
            this.serviceProcessInstaller1 = new System.ServiceProcess.ServiceProcessInstaller();
            this.serviceInstaller1 = new System.ServiceProcess.ServiceInstaller()
            {
                Description = "Description ",
                DisplayName = Get_ConfigValue(this.GetType().Assembly.Location + ".config", "JobDisplayName"),//System.Configuration.ConfigurationManager.AppSettings["JobDisplayName"].ToString(),
                ServiceName = Get_ConfigValue(this.GetType().Assembly.Location + ".config", "JobServiceName"),//System.Configuration.ConfigurationManager.AppSettings["JobServiceName"].ToString(),
                StartType = System.ServiceProcess.ServiceStartMode.Automatic
            };
            this.serviceInstaller2 = new System.ServiceProcess.ServiceInstaller()
            {
                Description = "Description ",
                DisplayName = Get_ConfigValue(this.GetType().Assembly.Location + ".config", "InterfaceDisplayName"), //System.Configuration.ConfigurationManager.AppSettings["InterfaceDisplayName"].ToString(),
                ServiceName = Get_ConfigValue(this.GetType().Assembly.Location + ".config", "InterfaceServiceName"),//System.Configuration.ConfigurationManager.AppSettings["InterfaceServiceName"].ToString(),
                StartType = System.ServiceProcess.ServiceStartMode.Automatic
            };
            // 
            // serviceProcessInstaller1
            // 
            this.serviceProcessInstaller1.Account = System.ServiceProcess.ServiceAccount.LocalSystem;
            this.serviceProcessInstaller1.Password = null;
            this.serviceProcessInstaller1.Username = null;

            // 
            // ProjectInstaller
            // 
            this.Installers.AddRange(new System.Configuration.Install.Installer[] {
            this.serviceProcessInstaller1,
            this.serviceInstaller1,
            this.serviceInstaller2});

        }

        #endregion

        private System.ServiceProcess.ServiceProcessInstaller serviceProcessInstaller1;
        private System.ServiceProcess.ServiceInstaller serviceInstaller1;
        private System.ServiceProcess.ServiceInstaller serviceInstaller2;

        protected static string Get_ConfigValue(
style="color: #0000ff;">string configpath, string strKeyName)
        {
            using (XmlTextReader tr = new XmlTextReader(configpath))
            {
                while (tr.Read())
                {
                    if (tr.NodeType == XmlNodeType.Element)
                    {
                        if (tr.Name == "add" && tr.GetAttribute("key") == strKeyName)
                        {
                            return tr.GetAttribute("value");
                        }
                    }
                }
            }
            return "";
        }
    }

}