NullPartial用于ASP MVC的HTML helper。

当传递一个空模型时，HTML。Partial和HTML。RenderPartial将提供视图的模型，如果这个部分是强类型的，而视图有不同的类型，它将抛出一个异常，而不是传递一个空引用。这些帮助程序允许您指定两个不同的部分，这样您就可以将空测试排除在视图之外。

您有权在Codeplex页面上包含此内容

public static class nullpartials
    {
        public static MvcHtmlString NullPartial(this HtmlHelper helper, string Partial, string NullPartial, object Model)
        {
            if (Model == null)
                return helper.Partial(NullPartial);
            else
                return helper.Partial(Partial, Model);
        }

        public static MvcHtmlString NullPartial(this HtmlHelper helper, string Partial, string NullPartial, object Model, ViewDataDictionary viewdata)
        {
            if (Model == null)
                return helper.Partial(NullPartial, viewdata);
            else
                return helper.Partial(Partial, Model, viewdata);
        }

        public static void RenderNullPartial(this HtmlHelper helper, string Partial, string NullPartial, object Model)
        {
            if (Model == null)
            {
                helper.RenderPartial(NullPartial);
                return;
            }
            else
            {
                helper.RenderPartial(Partial, Model);
                return;
            }
        }

        public static void RenderNullPartial(this HtmlHelper helper, string Partial, string NullPartial, object Model, ViewDataDictionary viewdata)
        {
            if (Model == null)
            {
                helper.RenderPartial(NullPartial, viewdata);
                return;
            }
            else
            {
                helper.RenderPartial(Partial, Model, viewdata);
                return;
            }
        }
    }

如果你有波斯语，并且必须用波斯语向用户显示数字:

static public string ToFaString         (this string value)
        {
            // 1728 , 1584
            string result = "";
            if (value != null)
            {
                char[] resChar = value.ToCharArray();
                for (int i = 0; i < resChar.Length; i++)
                {
                    if (resChar[i] >= '0' && resChar[i] <= '9')
                        result += (char)(resChar[i] + 1728);
                    else
                        result += resChar[i];
                }
            }
            return result;
        }

获取一个camelCaseWord或PascalCaseWord并将其“Word化”，即camelCaseWord => camelCaseWord

public static string Wordify( this string camelCaseWord )
{
    // if the word is all upper, just return it
    if( !Regex.IsMatch( camelCaseWord, "[a-z]" ) )
        return camelCaseWord;

    return string.Join( " ", Regex.Split( camelCaseWord, @"(?<!^)(?=[A-Z])" ) );
}

我经常将它与大写字母结合使用

public static string Capitalize( this string word )
{
    return word[0].ToString( ).ToUpper( ) + word.Substring( 1 );
}

示例使用

SomeEntityObject entity = DataAccessObject.GetSomeEntityObject( id );
List<PropertyInfo> properties = entity.GetType().GetPublicNonCollectionProperties( );

// wordify the property names to act as column headers for an html table or something
List<string> columns = properties.Select( p => p.Name.Capitalize( ).Wordify( ) ).ToList( );

在codeplex项目中免费使用

处理大小的简便方法:

public static class Extensions {
    public static int K(this int value) {
        return value * 1024;
    }
    public static int M(this int value) {
        return value * 1024 * 1024;
    }
}

public class Program {
    public void Main() {
        WSHttpContextBinding serviceMultipleTokenBinding = new WSHttpContextBinding() {
            MaxBufferPoolSize = 2.M(), // instead of 2097152
            MaxReceivedMessageSize = 64.K(), // instead of 65536
        };
    }
}

我有一个扩展方法记录异常:

public static void Log(this Exception obj)
{
  //your logging logic here
}

它的用法是这样的:

try
{
    //Your stuff here
}
catch(Exception ex)
{
    ex.Log();
}

[抱歉发了两次;第二个设计得更好:-)]

扩展方法:

public static void AddRange<T, S>(this ICollection<T> list, params S[] values)
    where S : T
{
    foreach (S value in values)
        list.Add(value);
}

该方法适用于所有类型，并允许您将一系列项作为参数添加到列表中。

例子:

var list = new List<Int32>();
list.AddRange(5, 4, 8, 4, 2);