Question

HI我正在尝试连接字符串，但我在此行收到错误

sql += " "+"WHERE memberToMship_PayMethod="' +Cash"'";

像字符文字中的字符太多......

任何人都可以帮忙......

                              sql = @"SELECT members.member_Id, members.member_Lastname, members.member_Firstname, members.member_IsBiometric";
  sql += ","+"members.member_Reference, members.member_Dob, members.member_PostCode, mshipstatustypes.mshipStatusType_Name, mshiptypes.mshipType_Name";
  sql += ","+"membertomships.memberToMship_EndDate";
  sql += " "+"FROM members LEFT JOIN membertomships ON membertomships.member_Id = members.member_Id";
  sql += " "+"LEFT JOIN mshipstatustypes ON mshipStatusType_Id = membertomships.mshipStatusType_Id";
  sql += " "+"LEFT JOIN mshipoptions ON mshipoptions.mshipOption_Id = membertomships.mshipOption_Id";
  sql += " "+"LEFT JOIN mshiptypes ON mshiptypes.mshipType_Id = mshipoptions.mshipType_Id";
  sql += " "+"WHERE memberToMship_PayMethod="' +Cash"'";

Answer 1

sql += " "+"WHERE memberToMship_PayMethod="' +Cash"'";

应该是

sql += " "+"WHERE memberToMship_PayMethod='" +Cash+ "'";

或

sql += " "+"WHERE memberToMship_PayMethod='Cash'";

Answer 2

你的引号在之外的双引号，你错过了+。试试这个：

sql += " "+"WHERE memberToMship_PayMethod='" + Cash + "'";

Answer 3

尝试

     sql = @"SELECT members.member_Id, members.member_Lastname, members.member_Firstname, members.member_IsBiometric";
  sql += ","+"members.member_Reference, members.member_Dob, members.member_PostCode, mshipstatustypes.mshipStatusType_Name, mshiptypes.mshipType_Name";
  sql += ","+"membertomships.memberToMship_EndDate";
  sql += " "+"FROM members LEFT JOIN membertomships ON membertomships.member_Id = members.member_Id";
  sql += " "+"LEFT JOIN mshipstatustypes ON mshipStatusType_Id = membertomships.mshipStatusType_Id";
  sql += " "+"LEFT JOIN mshipoptions ON mshipoptions.mshipOption_Id = membertomships.mshipOption_Id";
  sql += " "+"LEFT JOIN mshiptypes ON mshiptypes.mshipType_Id = mshipoptions.mshipType_Id";
  sql += " "+"WHERE memberToMship_PayMethod='" + "Cash" + "'";

Answer 4

实际上您不需要联系，您的查询很简单，因此您可以使用：

sqlQuery = @"Select * from ...........
..........................
where CashMethod="+Cash;

试图连接字符串但得到错误

4 个答案: