在 T4 模板中调用函数时出错

Question

我有以下 T4 模板：

<#@ template debug="true" hostspecific="false" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Text" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Reflection" #>
<#@ output extension=".cs" #>



using System;
using System.Linq;
using System.Reflection;

namespace GREDOS.Deployment.Resources
{
    public static class Constants
    {
        public static readonly Version SupportedDatabaseVersion = new Version("<#= GetMaxVersionInResources(); #>");
    }
}

<#+
public static class Helper
    {
        public static string GetMaxVersionInResources()
        {
            var executingAssembly = Assembly.GetExecutingAssembly();
            var folderName = $"{executingAssembly.GetName().Name}.Sql";
            var versions = executingAssembly.GetManifestResourceNames()
                .Where(f => f.StartsWith(folderName))
                .Select(f => new Version(f.Substring(f.IndexOf("__", StringComparison.Ordinal) + 2,
                        f.LastIndexOf("__", StringComparison.Ordinal) - f.IndexOf("__", StringComparison.Ordinal))
                    .Replace("_", string.Empty)))
                .Distinct();
            return versions.Max(v => v).ToString();
        }
    }
#>

保存时出现以下错误：

Error CS0116 A namespace does not directly contain members such as fields or methods. GREDOS.Deployment.Resources C:\GREDOS\Main\GREDOS.Deployment\GREDOS.Deployment.Resources\SqlVersionFinder.cs 1

Error CS0103 Name 'ErrorGeneratingOutput' does not exist in the current context. GREDOS.Deployment.Resources C:\GREDOS\Main\GREDOS.Deployment\GREDOS.Deployment.Resources\SqlVersionFinder.cs

Error Compiling transform: Name 'GetMaxVersionInResources' does not exist in the current context GREDOS.Deployment.Resources C:\GREDOS\Main\GREDOS.Deployment\GREDOS.Deployment.Resources\SqlVersionFinder.tt

Error Compiling transform: Expected ) GREDOS.Deployment.Resources C:\GREDOS\Main\GREDOS.Deployment\GREDOS.Deployment.Resources\SqlVersionFinder.tt

Error Compiling transform: Expected } GREDOS.Deployment.Resources C:\GREDOS\Main\GREDOS.Deployment\GREDOS.Deployment.Resources\SqlVersionFinder.tt

如果我删除对 <#= GetMaxVersionInResources(); #> 中方法的调用，一切正常。

怎么了？

Answer 1

这样称呼它：

Helper.GetMaxVersionInResources();

在 T4 模板中调用函数时出错

Error calling function in T4 template

.net

c#

t4