如何解决最好的重载方法匹配有一些无效的参数数据集

问题描述

我使用数据集并且我正确地做了所有事情，字段作为数据库字段



但是这个消息总是出现给我：



编译错误



描述：编译服务此请求所需的资源时出错。请查看以下特定错误详细信息并相应地修改源代码。



编译器错误消息：CS1502：'KutubDataSetTableAdapters.BooksTableAdapter.InsertBook（字符串，字符串，十进制？，int？，int？，ref int）的最佳重载方法匹配？）'有一些无效的论点

I work with data set and I did every thing correctly, the fields as the Database fields

but always this message appears to me:

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS1502: The best overloaded method match for 'KutubDataSetTableAdapters.BooksTableAdapter.InsertBook(string, string, decimal?, int?, int?, ref int?)' has some invalid arguments

 int InsertBook(string BookName, string Description, int Price, int Publisher, int Category, int PublishDate)
    {

        KutubDataSetTableAdapters.BooksTableAdapter Bta = new KutubDataSetTableAdapters.BooksTableAdapter();

        return Bta.InsertBook(BookName, Description, Price, Publisher, Category, PublishDate);}
}

我试图用这个：

I tried to use this:

int InsertBook(string BookName, string Description, decumal? Price, int? Publisher, int? Category,ref int? PublishDate)

它没有成功..

And it didn't success..

推荐答案

int? thePublishDate = PublishDate;
return Bta.InsertBook(BookName, Description, Price, Publisher, Category, ref thePublishDate);

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