函数的无效参数错误

Question

函数 MoldingDetail_UpdateDetails(string mouldItem, string mouldQty, int core, int freerider, decimal plate, string plant, string systemMode)

在传递 MouldingDetail_UpdateDetails("AX5M211531", '1', 1, 1, '0.5', "CMLD1", string.Empty) 后，当我将以下内容作为值传递时，它显示“无效参数”

Answer 1

'1' 不是有效的字符串，而是一个字符。

为了正确理解，请阅读 -https://msdn.microsoft.com/en-us/library/cs7y5x0x(v=vs.90).aspx

Answer 2

这是方法的签名：

MouldingDetail_UpdateDetails(
     string,
     string,
     int,
     int,
     decimal,
     string,
     string
)

然而，你正在通过：

MouldingDetail_UpdateDetails(
     "AX5M211531" (string), // Good
     '1' (char),            // Wrong! This is supposed to be a string! use "1" instead
      1 (int),              // Good
      1 (int),              // Good
      '0.5' (invalid char), // Wrong! This shouldn't even compile. Use 0.5M without the single quotes
      "CMLD1" (string),     // Good
      string.Empty (string) // Good
);