函数的参数错误无效

Question

功能 MouldingDetail_UpdateDetails（string mouldItem，string mouldQty，int core，int freerider，decimal plate，string plant，string systemMode）

过了之后  当我通过时，MouldingDetail_UpdateDetails（＆＃34; AX5M211531＆＃34;，＆＃39; 1＆＃39;，1,1，＆＃39; 0.5＆＃39;，＆＃34; CMLD1＆＃34;，string.Empty）以下是它显示的值＆＃34;无效的参数＆＃34;

Answer 1

'1'不是有效字符串，而是字符串。

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

Answer 2

这是该方法的签名：

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

然而，你正在路过：

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
);