CS7069 C# Reference to type 'Component' claims it is defined in 'System', but it could not be found
0
I am building winForm application,
and i try to make a connection function for mssql Server
but SqlConnection open/close always show
"CS7069 C# Reference to type 'Component' claims it is defined in 'System', but it could not be found"
how could I fix this issue?
public class SQLAPI
{
SqlConnection cn;
Boolean openConnect()
{
bool rtn = false;
try
{
cn = new SqlConnection("server=localhost;database=testDB;UID=ad;PWD=1234");
cn.Open();
}
catch (Exception e)
{
}
return rtn;
}
void closeConnect()
{
try {
cn.Close();
}
catch (Exception e)
{ }
}
}
c# winforms sqlconnection
asked Nov 13 at 18:06
NeilLin
476
add a comment |
0
I am building winForm application,
and i try to make a connection function for mssql Server
but SqlConnection open/close always show
"CS7069 C# Reference to type 'Component' claims it is defined in 'System', but it could not be found"
how could I fix this issue?
public class SQLAPI
{
SqlConnection cn;
Boolean openConnect()
{
bool rtn = false;
try
{
cn = new SqlConnection("server=localhost;database=testDB;UID=ad;PWD=1234");
cn.Open();
}
catch (Exception e)
{
}
return rtn;
}
void closeConnect()
{
try {
cn.Close();
}
catch (Exception e)
{ }
}
}
c# winforms sqlconnection
asked Nov 13 at 18:06
NeilLin
476
Are the database credentials Windows. If so do not use UID and PWD.. Instead use Trusted_Connection=True; (see connectionstrings.com/sql-server). also open up SQL Server Management Studio and get the instead of the data base which is in the login window. You need localhost/{instance}
– jdweng
Nov 13 at 18:13
cn.Open/ cn.Close show the message before compile....
– NeilLin
Nov 14 at 2:33
The error is : ERROR_TS_INCOMPATIBLE_SESSIONS, The target session is incompatible with the current session (see : docs.microsoft.com/en-us/windows/desktop/debug/…). I don't thing your project (and reference projects) go completely recompiled due to dependencies in the compiler. I would make a copy of the project bin folder and then delete to force all the code to get recompiled. See : stackoverflow.com/questions/36723359/…
– jdweng
Nov 14 at 10:31
add a comment |
0
0
0
I am building winForm application,
and i try to make a connection function for mssql Server
but SqlConnection open/close always show
"CS7069 C# Reference to type 'Component' claims it is defined in 'System', but it could not be found"
how could I fix this issue?
public class SQLAPI
{
SqlConnection cn;
Boolean openConnect()
{
bool rtn = false;
try
{
cn = new SqlConnection("server=localhost;database=testDB;UID=ad;PWD=1234");
cn.Open();
}
catch (Exception e)
{
}
return rtn;
}
void closeConnect()
{
try {
cn.Close();
}
catch (Exception e)
{ }
}
}
c# winforms sqlconnection
asked Nov 13 at 18:06
NeilLin
476
I am building winForm application,
and i try to make a connection function for mssql Server
but SqlConnection open/close always show
"CS7069 C# Reference to type 'Component' claims it is defined in 'System', but it could not be found"
how could I fix this issue?
public class SQLAPI
{
SqlConnection cn;
Boolean openConnect()
{
bool rtn = false;
try
{
cn = new SqlConnection("server=localhost;database=testDB;UID=ad;PWD=1234");
cn.Open();
}
catch (Exception e)
{
}
return rtn;
}
void closeConnect()
{
try {
cn.Close();
}
catch (Exception e)
{ }
}
}
c# winforms sqlconnection
c# winforms sqlconnection
asked Nov 13 at 18:06
NeilLin
476
asked Nov 13 at 18:06
NeilLin
476
asked Nov 13 at 18:06
NeilLin
476
asked Nov 13 at 18:06
NeilLin
476
asked Nov 13 at 18:06
NeilLin
476
476
Are the database credentials Windows. If so do not use UID and PWD.. Instead use Trusted_Connection=True; (see connectionstrings.com/sql-server). also open up SQL Server Management Studio and get the instead of the data base which is in the login window. You need localhost/{instance}
– jdweng
Nov 13 at 18:13
cn.Open/ cn.Close show the message before compile....
– NeilLin
Nov 14 at 2:33
The error is : ERROR_TS_INCOMPATIBLE_SESSIONS, The target session is incompatible with the current session (see : docs.microsoft.com/en-us/windows/desktop/debug/…). I don't thing your project (and reference projects) go completely recompiled due to dependencies in the compiler. I would make a copy of the project bin folder and then delete to force all the code to get recompiled. See : stackoverflow.com/questions/36723359/…
– jdweng
Nov 14 at 10:31
add a comment |
Are the database credentials Windows. If so do not use UID and PWD.. Instead use Trusted_Connection=True; (see connectionstrings.com/sql-server). also open up SQL Server Management Studio and get the instead of the data base which is in the login window. You need localhost/{instance}
– jdweng
Nov 13 at 18:13
cn.Open/ cn.Close show the message before compile....
– NeilLin
Nov 14 at 2:33
The error is : ERROR_TS_INCOMPATIBLE_SESSIONS, The target session is incompatible with the current session (see : docs.microsoft.com/en-us/windows/desktop/debug/…). I don't thing your project (and reference projects) go completely recompiled due to dependencies in the compiler. I would make a copy of the project bin folder and then delete to force all the code to get recompiled. See : stackoverflow.com/questions/36723359/…
– jdweng
Nov 14 at 10:31
Are the database credentials Windows. If so do not use UID and PWD.. Instead use Trusted_Connection=True; (see connectionstrings.com/sql-server). also open up SQL Server Management Studio and get the instead of the data base which is in the login window. You need localhost/{instance}
– jdweng
Nov 13 at 18:13
Are the database credentials Windows. If so do not use UID and PWD.. Instead use Trusted_Connection=True; (see connectionstrings.com/sql-server). also open up SQL Server Management Studio and get the instead of the data base which is in the login window. You need localhost/{instance}
– jdweng
Nov 13 at 18:13
cn.Open/ cn.Close show the message before compile....
– NeilLin
Nov 14 at 2:33
cn.Open/ cn.Close show the message before compile....
– NeilLin
Nov 14 at 2:33
The error is : ERROR_TS_INCOMPATIBLE_SESSIONS, The target session is incompatible with the current session (see : docs.microsoft.com/en-us/windows/desktop/debug/…). I don't thing your project (and reference projects) go completely recompiled due to dependencies in the compiler. I would make a copy of the project bin folder and then delete to force all the code to get recompiled. See : stackoverflow.com/questions/36723359/…
– jdweng
Nov 14 at 10:31
The error is : ERROR_TS_INCOMPATIBLE_SESSIONS, The target session is incompatible with the current session (see : docs.microsoft.com/en-us/windows/desktop/debug/…). I don't thing your project (and reference projects) go completely recompiled due to dependencies in the compiler. I would make a copy of the project bin folder and then delete to force all the code to get recompiled. See : stackoverflow.com/questions/36723359/…
– jdweng
Nov 14 at 10:31
add a comment |
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Are the database credentials Windows. If so do not use UID and PWD.. Instead use Trusted_Connection=True; (see connectionstrings.com/sql-server). also open up SQL Server Management Studio and get the instead of the data base which is in the login window. You need localhost/{instance}
– jdweng
Nov 13 at 18:13
cn.Open/ cn.Close show the message before compile....
– NeilLin
Nov 14 at 2:33
The error is : ERROR_TS_INCOMPATIBLE_SESSIONS, The target session is incompatible with the current session (see : docs.microsoft.com/en-us/windows/desktop/debug/…). I don't thing your project (and reference projects) go completely recompiled due to dependencies in the compiler. I would make a copy of the project bin folder and then delete to force all the code to get recompiled. See : stackoverflow.com/questions/36723359/…
– jdweng
Nov 14 at 10:31