Visual Studio 编辑 AddView 列表后不运行 T4-解网

问：

我从这条路径编辑了 T4 List.tt：C:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\ItemTemplates\CSharp\Web\MVC 4\CodeTemplates\AddView\CSHTML

以及尝试从此处添加视图时从控制器添加视图

这是旧代码：

<#@ template language="C#" HostSpecific="True" #>
<#@ output extension=".cshtml" #>
<#@ assembly name="System.ComponentModel.DataAnnotations" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="System.Data.Entity" #>
<#@ assembly name="System.Data.Linq" #>
<#@ import namespace="System" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.ComponentModel.DataAnnotations" #>
<#@ import namespace="System.Data.Linq.Mapping" #>
<#@ import namespace="System.Data.Objects.DataClasses" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Reflection" #>
<#@ import namespace="Microsoft.VisualStudio.Web.Mvc.Scaffolding.BuiltIn" #>
<#
MvcTextTemplateHost mvcHost = MvcTemplateHost;
#>
@model IEnumerable<#= "<" + mvcHost.ViewDataTypeName + ">" #>
<#
// The following chained if-statement outputs the file header code and markup for a partial view, a content page, or a regular view.
if(mvcHost.IsPartialView) {
#>

<#
} else if(mvcHost.IsContentPage) {
#>

@{
    ViewBag.Title = "<#= mvcHost.ViewName#>";
<#
if (!String.IsNullOrEmpty(mvcHost.MasterPageFile)) {
#>
    Layout = "<#= mvcHost.MasterPageFile#>";
<#
}
#>
}

<h2><#= mvcHost.ViewName#></h2>

<#
} else {
#>

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title><#= mvcHost.ViewName #></title>
</head>
<body>
<#
    PushIndent("    ");
}
#>
<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table>
    <tr>
<#
List<ModelProperty> properties = GetModelProperties(mvcHost.ViewDataType);
foreach (ModelProperty property in properties) {
    if (!property.IsPrimaryKey && property.Scaffold) {
#>
        <th>
            @Html.DisplayNameFor(model => model.<#= property.ValueExpression #>)
        </th>
<#
    }
}
#>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
<#
foreach (ModelProperty property in properties) {
    if (!property.IsPrimaryKey && property.Scaffold) {
#>
        <td>
            @Html.DisplayFor(modelItem => <#= property.ItemValueExpression #>)
        </td>
<#
    }
}

string pkName = GetPrimaryKeyName(mvcHost.ViewDataType);
if (pkName != null) {
#>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.<#= pkName #> }) |
            @Html.ActionLink("Details", "Details", new { id=item.<#= pkName #> }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.<#= pkName #> })
        </td>
<#
} else {
#>
        <td>
            @Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
            @Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ }) |
            @Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
        </td>
<#
}
#>
    </tr>
}

</table>
<#
// The following code closes the asp:Content tag used in the case of a master page and the body and html tags in the case of a regular view page
#>
<#
if(mvcHost.IsContentPage) {
#>
<#
} else if(!mvcHost.IsPartialView && !mvcHost.IsContentPage) {
    ClearIndent();
#>
</body>
</html>
<#
}
#>
<#+
// Describes the information about a property on the model
class ModelProperty {
    public string Name { get; set; }
    public string AssociationName { get; set; }
    public string ValueExpression { get; set; }
    public string ModelValueExpression { get; set; }
    public string ItemValueExpression { get; set; }
    public Type UnderlyingType { get; set; }
    public bool IsPrimaryKey { get; set; }
    public bool IsForeignKey { get; set; }
    public bool IsReadOnly { get; set; }
    public bool Scaffold { get; set; }
}

// Change this list to include any non-primitive types you think should be eligible for display/edit
static Type[] bindableNonPrimitiveTypes = new[] {
    typeof(string),
    typeof(decimal),
    typeof(Guid),
    typeof(DateTime),
    typeof(DateTimeOffset),
    typeof(TimeSpan),
};

// Call this to get the list of properties in the model. Change this to modify or add your
// own default formatting for display values.
List<ModelProperty> GetModelProperties(Type type) {
    List<ModelProperty> results = GetEligibleProperties(type);
    
    foreach (ModelProperty prop in results) {
        if (prop.UnderlyingType == typeof(double) || prop.UnderlyingType == typeof(decimal)) {
            prop.ModelValueExpression = "String.Format(\"{0:F}\", " + prop.ModelValueExpression + ")";
        }
        else if (prop.UnderlyingType == typeof(DateTime)) {
            prop.ModelValueExpression = "String.Format(\"{0:g}\", " + prop.ModelValueExpression + ")";
        }
    }

    return results;
}

// Call this to determine if property has scaffolding enabled
bool Scaffold(PropertyInfo property) {
    foreach (object attribute in property.GetCustomAttributes(true)) {
        var scaffoldColumn = attribute as ScaffoldColumnAttribute;
        if (scaffoldColumn != null && !scaffoldColumn.Scaffold) {
            return false;
        }
    }
    return true;
}

// Call this to determine if the property represents a primary key. Change the
// code to change the definition of primary key.
bool IsPrimaryKey(PropertyInfo property) {
    if (string.Equals(property.Name, "id", StringComparison.OrdinalIgnoreCase)) {  // EF Code First convention
        return true;
    }

    if (string.Equals(property.Name, property.DeclaringType.Name + "id", StringComparison.OrdinalIgnoreCase)) {  // EF Code First convention
        return true;
    }

    foreach (object attribute in property.GetCustomAttributes(true)) {
        if (attribute is KeyAttribute) {  // WCF RIA Services and EF Code First explicit
            return true;
        }
        
        var edmScalar = attribute as EdmScalarPropertyAttribute;
        if (edmScalar != null && edmScalar.EntityKeyProperty) {  // EF traditional
            return true;
        }

        var column = attribute as ColumnAttribute;
        if (column != null && column.IsPrimaryKey) {  // LINQ to SQL
            return true;
        }
    }
    
    return false;
}

// This will return the primary key property name, if and only if there is exactly
// one primary key. Returns null if there is no PK, or the PK is composite.
string GetPrimaryKeyName(Type type) {
    IEnumerable<string> pkNames = GetPrimaryKeyNames(type);
    return pkNames.Count() == 1 ? pkNames.First() : null;
}

// This will return all the primary key names. Will return an empty list if there are none.
IEnumerable<string> GetPrimaryKeyNames(Type type) {
    return GetEligibleProperties(type).Where(mp => mp.IsPrimaryKey).Select(mp => mp.Name);
}

// Call this to determine if the property represents a foreign key.
bool IsForeignKey(PropertyInfo property) {
    return MvcTemplateHost.RelatedProperties.ContainsKey(property.Name);
}

// A foreign key, e.g. CategoryID, will have a value expression of Category.CategoryID
string GetValueExpressionSuffix(PropertyInfo property) {
    RelatedModel propertyModel;
    MvcTemplateHost.RelatedProperties.TryGetValue(property.Name, out propertyModel);

    return propertyModel != null ? propertyModel.PropertyName + "." + propertyModel.DisplayPropertyName : property.Name;
}

// A foreign key, e.g. CategoryID, will have an association name of Category
string GetAssociationName(PropertyInfo property) {
    RelatedModel propertyModel;
    MvcTemplateHost.RelatedProperties.TryGetValue(property.Name, out propertyModel);

    return propertyModel != null ? propertyModel.PropertyName : property.Name;
}

// Helper
List<ModelProperty> GetEligibleProperties(Type type) {
    List<ModelProperty> results = new List<ModelProperty>();

    foreach (PropertyInfo prop in type.GetProperties(BindingFlags.Public | BindingFlags.Instance)) {
        Type underlyingType = Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType;
        if (prop.GetGetMethod() != null && prop.GetIndexParameters().Length == 0 && IsBindableType(underlyingType)) {
            string valueExpression = GetValueExpressionSuffix(prop);

            results.Add(new ModelProperty {
                Name = prop.Name,
                AssociationName = GetAssociationName(prop),
                ValueExpression = valueExpression,
                ModelValueExpression = "Model." + valueExpression,
                ItemValueExpression = "item." + valueExpression,
                UnderlyingType = underlyingType,
                IsPrimaryKey = IsPrimaryKey(prop),
                IsForeignKey = IsForeignKey(prop),
                IsReadOnly = prop.GetSetMethod() == null,
                Scaffold = Scaffold(prop)
            });
        }
    }

    return results;
}

// Helper
bool IsBindableType(Type type) {
    return type.IsPrimitive || bindableNonPrimitiveTypes.Contains(type);
}

MvcTextTemplateHost MvcTemplateHost {
    get {
        return (MvcTextTemplateHost)Host;
    }
}
#>

这是新代码：

<#@ template language="C#" HostSpecific="True" #>
<#@ output extension=".cshtml" #>
<#@ assembly name="System.ComponentModel.DataAnnotations" #>
<#@ assembly name="System.Core" #>
<#@ assembly name="System.Data.Entity" #>
<#@ assembly name="System.Data.Linq" #>
<#@ import namespace="System" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.ComponentModel.DataAnnotations" #>
<#@ import namespace="System.Data.Linq.Mapping" #>
<#@ import namespace="System.Data.Objects.DataClasses" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Reflection" #>
<#@ import namespace="Microsoft.VisualStudio.Web.Mvc.Scaffolding.BuiltIn" #>
<#
MvcTextTemplateHost mvcHost = MvcTemplateHost;
#>
@model IEnumerable<#= "<" + mvcHost.ViewDataTypeName + ">" #>
<#
// The following chained if-statement outputs the file header code and markup for a partial view, a content page, or a regular view.
if(mvcHost.IsPartialView) {
#>

<#
} else if(mvcHost.IsContentPage) {
#>

@{
    ViewBag.Title = "<#= mvcHost.ViewName#>";
<#
if (!String.IsNullOrEmpty(mvcHost.MasterPageFile)) {
#>
    Layout = "<#= mvcHost.MasterPageFile#>";
<#
}
#>
}

<h2>@ViewDate["Title"]</h2>

<#
} else {
#>

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title><#= mvcHost.ViewName #></title>
</head>
<body>
<#
    PushIndent("    ");
}
#>
<div class="d-grid gap-2 d-md-flex justify-content-md-end">
  <a asp-action="Create" class="btn btn-primary me-md-2">Create New</a>
</div>
<table class="table">
    <tr>
<#
List<ModelProperty> properties = GetModelProperties(mvcHost.ViewDataType);
foreach (ModelProperty property in properties) {
    if (!property.IsPrimaryKey && property.Scaffold) {
#>
        <th>
            @Html.DisplayNameFor(model => model.<#= property.ValueExpression #>)
        </th>
<#
    }
}
#>
        <th>Actions</th>
    </tr>

@foreach (var item in Model) {
    <tr>
<#
foreach (ModelProperty property in properties) {
    if (!property.IsPrimaryKey && property.Scaffold) {
#>
        <td>
            @Html.DisplayFor(modelItem => <#= property.ItemValueExpression #>)
        </td>
<#
    }
}

string pkName = GetPrimaryKeyName(mvcHost.ViewDataType);
if (pkName != null) {
#>
        <td>
            <a class="btn btn-warning me-2" asp-action="Edit" asp-route-id="@item.<#= pkName #>">Edit</a>
            <a class="btn btn-info me-2" asp-action="Details" asp-route-id="@item.<#= pkName #>">Details</a>
            <a class="btn btn-danger me-2" asp-action="Delete" asp-route-id="@item.<#= pkName #>">Delete</a>
        </td>
<#
} else {
#>
        <td>
            <a class="btn btn-warning me-2" asp-action="Edit" asp-route-id="">Edit</a>
            <a class="btn btn-info me-2" asp-action="Details" asp-route-id="">Details</a>
            <a class="btn btn-danger me-2" asp-action="Delete" asp-route-id="">Delete</a>
        </td>
<#
}
#>
    </tr>
}

</table>
<#
// The following code closes the asp:Content tag used in the case of a master page and the body and html tags in the case of a regular view page
#>
<#
if(mvcHost.IsContentPage) {
#>
<#
} else if(!mvcHost.IsPartialView && !mvcHost.IsContentPage) {
    ClearIndent();
#>
</body>
</html>
<#
}
#>
<#+
// Describes the information about a property on the model
class ModelProperty {
    public string Name { get; set; }
    public string AssociationName { get; set; }
    public string ValueExpression { get; set; }
    public string ModelValueExpression { get; set; }
    public string ItemValueExpression { get; set; }
    public Type UnderlyingType { get; set; }
    public bool IsPrimaryKey { get; set; }
    public bool IsForeignKey { get; set; }
    public bool IsReadOnly { get; set; }
    public bool Scaffold { get; set; }
}

// Change this list to include any non-primitive types you think should be eligible for display/edit
static Type[] bindableNonPrimitiveTypes = new[] {
    typeof(string),
    typeof(decimal),
    typeof(Guid),
    typeof(DateTime),
    typeof(DateTimeOffset),
    typeof(TimeSpan),
};

// Call this to get the list of properties in the model. Change this to modify or add your
// own default formatting for display values.
List<ModelProperty> GetModelProperties(Type type) {
    List<ModelProperty> results = GetEligibleProperties(type);
    
    foreach (ModelProperty prop in results) {
        if (prop.UnderlyingType == typeof(double) || prop.UnderlyingType == typeof(decimal)) {
            prop.ModelValueExpression = "String.Format(\"{0:F}\", " + prop.ModelValueExpression + ")";
        }
        else if (prop.UnderlyingType == typeof(DateTime)) {
            prop.ModelValueExpression = "String.Format(\"{0:g}\", " + prop.ModelValueExpression + ")";
        }
    }

    return results;
}

// Call this to determine if property has scaffolding enabled
bool Scaffold(PropertyInfo property) {
    foreach (object attribute in property.GetCustomAttributes(true)) {
        var scaffoldColumn = attribute as ScaffoldColumnAttribute;
        if (scaffoldColumn != null && !scaffoldColumn.Scaffold) {
            return false;
        }
    }
    return true;
}

// Call this to determine if the property represents a primary key. Change the
// code to change the definition of primary key.
bool IsPrimaryKey(PropertyInfo property) {
    if (string.Equals(property.Name, "id", StringComparison.OrdinalIgnoreCase)) {  // EF Code First convention
        return true;
    }

    if (string.Equals(property.Name, property.DeclaringType.Name + "id", StringComparison.OrdinalIgnoreCase)) {  // EF Code First convention
        return true;
    }

    foreach (object attribute in property.GetCustomAttributes(true)) {
        if (attribute is KeyAttribute) {  // WCF RIA Services and EF Code First explicit
            return true;
        }
        
        var edmScalar = attribute as EdmScalarPropertyAttribute;
        if (edmScalar != null && edmScalar.EntityKeyProperty) {  // EF traditional
            return true;
        }

        var column = attribute as ColumnAttribute;
        if (column != null && column.IsPrimaryKey) {  // LINQ to SQL
            return true;
        }
    }
    
    return false;
}

// This will return the primary key property name, if and only if there is exactly
// one primary key. Returns null if there is no PK, or the PK is composite.
string GetPrimaryKeyName(Type type) {
    IEnumerable<string> pkNames = GetPrimaryKeyNames(type);
    return pkNames.Count() == 1 ? pkNames.First() : null;
}

// This will return all the primary key names. Will return an empty list if there are none.
IEnumerable<string> GetPrimaryKeyNames(Type type) {
    return GetEligibleProperties(type).Where(mp => mp.IsPrimaryKey).Select(mp => mp.Name);
}

// Call this to determine if the property represents a foreign key.
bool IsForeignKey(PropertyInfo property) {
    return MvcTemplateHost.RelatedProperties.ContainsKey(property.Name);
}

// A foreign key, e.g. CategoryID, will have a value expression of Category.CategoryID
string GetValueExpressionSuffix(PropertyInfo property) {
    RelatedModel propertyModel;
    MvcTemplateHost.RelatedProperties.TryGetValue(property.Name, out propertyModel);

    return propertyModel != null ? propertyModel.PropertyName + "." + propertyModel.DisplayPropertyName : property.Name;
}

// A foreign key, e.g. CategoryID, will have an association name of Category
string GetAssociationName(PropertyInfo property) {
    RelatedModel propertyModel;
    MvcTemplateHost.RelatedProperties.TryGetValue(property.Name, out propertyModel);

    return propertyModel != null ? propertyModel.PropertyName : property.Name;
}

// Helper
List<ModelProperty> GetEligibleProperties(Type type) {
    List<ModelProperty> results = new List<ModelProperty>();

    foreach (PropertyInfo prop in type.GetProperties(BindingFlags.Public | BindingFlags.Instance)) {
        Type underlyingType = Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType;
        if (prop.GetGetMethod() != null && prop.GetIndexParameters().Length == 0 && IsBindableType(underlyingType)) {
            string valueExpression = GetValueExpressionSuffix(prop);

            results.Add(new ModelProperty {
                Name = prop.Name,
                AssociationName = GetAssociationName(prop),
                ValueExpression = valueExpression,
                ModelValueExpression = "Model." + valueExpression,
                ItemValueExpression = "item." + valueExpression,
                UnderlyingType = underlyingType,
                IsPrimaryKey = IsPrimaryKey(prop),
                IsForeignKey = IsForeignKey(prop),
                IsReadOnly = prop.GetSetMethod() == null,
                Scaffold = Scaffold(prop)
            });
        }
    }

    return results;
}

// Helper
bool IsBindableType(Type type) {
    return type.IsPrimitive || bindableNonPrimitiveTypes.Contains(type);
}

MvcTextTemplateHost MvcTemplateHost {
    get {
        return (MvcTextTemplateHost)Host;
    }
}
#>

完成后并重新启动 Visual Studio 2022 Not 后，添加视图以供操作时，新列表不起作用

搜索任何相关文章以解决此问题。

这些说明如下：

以下是重新生成已编辑的 T4 模板的步骤：

进行编辑：在文本编辑器或集成开发环境（如 Visual Studio）中打开指定路径（C：\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\ItemTemplates\CSharp\Web\MVC 4\CodeTemplates\AddView\CSHTML）中的 List.tt 文件。
编辑模板：根据需要修改 List.tt 文件的内容，以进行所需的更改。
保存更改：进行编辑后保存 List.tt 文件。
打开 Visual Studio：打开或重启 Visual Studio。
创建新视图：在 ASP.NET Core 项目中，创建新视图或重新生成应使用修改后的模板的现有视图。右键单击要创建视图的文件夹（例如，在“视图”文件夹中），选择“添加”，然后选择“查看”。
配置视图选项：在“添加视图”对话框中，配置视图的选项。请确保选择与您编辑的 List.tt 模板相对应的适当模板。
重新生成代码：单击“添加视图”对话框中的“添加”按钮以重新生成视图。Visual Studio 会将更改应用于 List.tt 模板并相应地生成代码。

模板 T4

答： 暂无答案

上一个：从 cli 运行 t4 预处理模板

下一个：有没有办法从 T4 模板中获取参数名称及其各自的类型？

Visual Studio 编辑 AddView 列表后不运行 T4

Visual studio Not run T4 after edit AddView List

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