Mysql 试图连接字符串，但出现错误

嗨，我正在尝试连接字符串，但我在这一行出错

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

像字符文字中的字符太多

有人能帮忙吗请

                              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"'";

在双引号之外有一个引号，但缺少一个

+

。试试这个：

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

在双引号之外有一个引号，但缺少一个

+

。试试这个：

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

应该是

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

或

应该是

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

或

试一试

     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" + "'";

试一试

     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" + "'";

---

事实上，您不需要具体说明，您的查询很简单，因此可以使用：

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

---

事实上，您不需要具体说明，您的查询很简单，因此可以使用：

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

---

为什么要将

“

与来自成员的

”连接起来…

而不仅仅是执行来自成员的

“…

现金是列值之一，如果可能，您会重新格式化。.为什么要将

“

与来自成员的

”连接起来…

而不仅仅是执行来自成员的

“…”

cash是列值之一。如果可能的话，你会重新格式化吗..哇，你真的有点盲目地把东西拼凑在一起，是吗？；-）哇，你真的有点盲目地把东西拼凑在一起，是吗？；-）