Visual Studio自定义模板（三）

继续Visual Studio自定义模板（二），要想实现动态的自定义模板参数，还要回到vstemplate文件，在该文件中，我们可以配置自己的向导扩展WizardExtension, 通过WizardExtension，我们就可以在向导生成文件的过程中加入自定义的代码了。

首先我们实现一个简单的自定义Wizard,

  
    namespace MyTemplate
{
    using System;
    using System.Collections.Generic;
    using Microsoft.VisualStudio.TemplateWizard;

    public class MyWizard : IWizard
    {
        /// <summary>
        /// Runs custom wizard logic before opening an item in the template.
        /// </summary>
        /// <param name="projectItem">The project item that will be opened.</param>
        public void BeforeOpeningFile(EnvDTE.ProjectItem projectItem)
        {
        }

        /// <summary>
        /// Runs custom wizard logic when a project has finished generating.
        /// </summary>
        /// <param name="project">The project that finished generating.</param>
        public void ProjectFinishedGenerating(EnvDTE.Project project)
        {
        }

        /// <summary>
        /// Runs custom wizard logic when a project item has finished generating.
        /// </summary>
        /// <param name="projectItem">The project item that finished generating.</param>
        public void ProjectItemFinishedGenerating(EnvDTE.ProjectItem projectItem)
        {
        }

        /// <summary>
        /// Runs custom wizard logic when the wizard has completed all tasks.
        /// </summary>
        public void RunFinished()
        {
        }

        /// <summary>
        /// Runs the started.
        /// </summary>
        /// <param name="automationObject">The automation object.</param>
        /// <param name="replacementsDictionary">The replacements dictionary.</param>
        /// <param name="runKind">Kind of the run.</param>
        /// <param name="customParameters">The custom parameters.</param>
        public void RunStarted(object automationObject,
            Dictionary<string, string> replacementsDictionary,
            WizardRunKind runKind,
            object[] customParameters)
        {
            replacementsDictionary.Add("$MyDate$", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
        }

        /// <summary>
        /// Indicates whether the specified project item should be added to the project.
        /// </summary>
        /// <param name="filePath">The path to the project item.</param>
        /// <returns>
        /// true if the project item should be added to the project; otherwise, false.
        /// </returns>
        public bool ShouldAddProjectItem(string filePath)
        {
            return true;
        }
    }
}

至于IWizard各个方法的具体定义，请大家参考MSDN，这里，我在RunStarted方法中添加了一个自模板参数$MyDate$，它的值为DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")，也就是说在模板文件中所有$MyDate$都会被替换成指定的具体的日期字符串。

下一步就是在vstemplate文件中加入我们定义的Wizard的配置，VS有一个要求，所有向导扩展都必须安装在GAC中，所以我们要强命名我们刚才生成的程序集，安装到GAC中。首先在[我的文档]\Visual Studio 2005\Templates\ItemTemplates中找到我们在2中生成的模板，解压后修改vstemplate文件如下，

< VSTemplate Version ="2.0.0" xmlns ="http://schemas.microsoft.com/developer/vstemplate/2005" Type ="Item" >
…
< WizardExtension >
< Assembly > MyTemplate, Version=1.0.0.0, Culture=neutral, PublicKeyToken=5ea13aa0d9868d4b </ Assembly >
< FullClassName >
MyTemplate.MyWizard
</ FullClassName >
</ WizardExtension >
</ VSTemplate >

注，上面Assembly的配置信息要根据具体的强命名信息作适当更改。