I want to connect through code c# with wamp mysql but have some problem...
Under MySql of this line
using MySql.Data.MySqlClient;
I have error
Error 1
The type or namespace name 'MySql' could not be found (are you
missing a using directive or an assembly reference?)
I have searched this problem from net but according to that solutions, my microsoft visual 2008 should have mysql.data and web.data in add reference but I don't have these references
If any one have any alternative solution then please help me
thanks
you need to run through the installation of the mysql connector libraries, then add a reference to them in your project. after that, you should be able to add the using statement for MySql.Data.MySqlClient.
You have to add MySQL as a reference.
http://msdn.microsoft.com/en-us/library/7314433t%28v=vs.80%29.aspx
Of course, you'll have to install/download them first.
Make sure that you have the necessary assemblies referenced in your project (in Solution Explorer there is a References section. You can view and add through that).
Also, if you do have the above complete, then you need to have using yourNameSpace;.
Related
I've been attempting to connect a MySql database to my project in Visual Studio 2015. In order to connect it in the Server Explorer, I had to download and add the reference to my project. Easy peasy.
Then, when I attempted to follow this tutorial, I get this error message:
The type or namespace name 'MySqlConnection' could not be found (are you missing a using directive or an assembly reference?)
I have indeed added the assembly reference (I believe, if I understand the term correctly), by checking the MySql.Data in the References/Extension.
Am I using the wrong MySql.Data? How do I know which one? I've read that perhaps it can have to do with mixed versions of .NET Frameworks, but honestly I don't know how to check.
I'm an up-and-coming programmer, who before this, had only worked with static, hard-coded webpages, and never used databases in a project before.
EDIT: I have indeed added the 'using MySql.Data.MySqlClient to the same class file as I am attempting to use it in.
More information. What is displayed when I hover over the Data in MySql.Data.MySqlClient in the 'using' statements.
Your first screenshot shows the quickactions window suggesting that you use a fully qualified name, for the type, because it cannot determine where the type comes from.
Search to make sure that MySql.Data is not used, as a namespace, elsewhere in your project, so that it does not collide with the MySql.Data namespace from the dll you are referencing.
I have a server that Shrepoint installed on it.
I want to test this code:
SPUtility.GetLocalizedString Method
When I add reference to Microsoft.SharePoint.dll I can resolve SPSite and ... .The problem is When I want to build the project it does not recognize using Microsoft.SharePoint any more:
and I get this error:
Error 13 The type or namespace name 'SharePoint' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
where is the problem? I add reference to Microsoft.SharePoint.dll but in build time it does not works
Microsoft.SharePoint.dll from SharePoint 2010 use Framework 3.5
but
Microsoft.SharePoint.dll from SharePoint 2013 use Framework 4.0
try it.
Change Visual Studio project solution properties platform target to x64 and the target framework to .NET Framework 3.5.
Try to use this namespace:
using Microsoft.SharePoint.Utilities
In the link you gave, it says that the method resides in Namespace Microsoft.SharePoint.Utilities instead of Microsoft.SharePoint. This is just a guess maybe work, haven't tested it,
I am trying to connect to Oracle via C# but I am missing a reference to make this work:
using Oracle.DataAccess.Client;
The error is of course:
The type or namespace name 'Oracle' could not be found (are you
missing a using directive or an assembly reference?)
Since this is the standard error for missing a reference.
I am using Oracle 11.2.0.
I tried to find the reference online but I can't manage to find a working one. Also is there anything more I need in C# to connect to an Oracle database?
Where do I find the right reference?
Make sure you have installed the Oracle .Net stuff: ODP.NET.
This will include some .NET wrapper classes to the underlying Oracle client. If memory serves, they should be placed in GAC so should be easy to find from the VS.NET add references window.
I'm using C#, EF 4 in asp.net 4 and VS 2010.
I'm trying to load namespace System.Data.Linq with this code using System.Data.Linq
and I receive this error:
Error 2 The type or namespace name 'Linq' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)
Any idea what I'm doing wrong.
Right click your solution/project. Click Add Reference and search for System.Data.Linq and add the reference there and it should compile.
Just to confirm that Adding the reference to the project didn't work for me because it was already selected.
However, selecting "Copy Local, True" in the Properties pane for the reference made it start working.
That namespace is LINQ-to-SQL, so you'll also need to add a reference to System.Data.Linq.dll; it won't be added by default just by adding Entity Framework.
Try re-change target framework for your project.
Go to Proporties > Application > Target Framework change to another than used now, and next change it back.
VS Installer
The above answers didn't work for me, my problem was that I needed to add LINQ to SQL tools in Visual Studio.
For VS 2022 and project on .NET 6.0 --- Project \ Referencies \ search \ MindBox.Data.Linq, everywhere "OK", install (based on personnel expirience)
Also, may be, need install -- Referencies \MS.System.Linq.Queryable (or MS.Queryable, not remember)
After all action LinqToSQL will be work in project.
I have added Microsoft.SqlServer.Management.Smo.dll reference to my project, but it still gives me the error below. The referenced dll is in C:\Program Files\Microsoft SQL Server\100\SDK\Assemblies path.
Error 25 The type or namespace name 'Smo' does not exist in the namespace 'Microsoft.SqlServer.Management' (are you missing an assembly reference?)
All the classes that I use such as Restore, Serer class under the Smo namesapce also throws the error.
Please advise.
Where are you consuming this from? Any chance you're using the client profile (under project properties -> Application -> Target Framework)? I've been caught out a number of times by that. If that's the case, it's usually as simple as selecting a non-client profile framework version.
Anyway, can we get some more detail about what kind of solution this is?
I have had the same problem, I noticed my project was targeting framework 3.
Changing to 3.5 or 4 helped solve the problem.
My reference are to
Microsoft.SqlServer.ConnectionInfo
Microsoft.SqlServer.Smo
Microsoft.SqlServer.Management.Sdk.Sfc
I think you have to add all 4 dlls (link):
Most of the classes
Microsoft.SqlServer.Management.Smo
namespace resides in the
Microsoft.SqlServer.Smo.dll and
Microsoft.SqlServer.SmoExtended.dll
files. Additionally, some of the
enumeration classes are in the
Microsoft.SqlServer.SqlEnum.dll and
Microsoft.SqlServer.SmoEnum.dll
assembly files. You will have to
import all four files to access all of
the classes in the
Microsoft.SqlServer.Management.Smo
namespace
If you are using Visual Studio 2008 then
Add References
Microsoft.SqlServer.ConnectionInfo
Microsoft.SqlServer.Smo
Microsoft.SqlServer.SmoEnum
Microsoft.SqlServer.SqlEnum
if still u got error
then add two more dll
microsoft.sqlserver.SmoEx...
Microsoft.SqlServer.ConnectionInfoEx...
Hope it will work
Thank you.
add reference to "Microsoft.SqlServer.Management.Sdk.Sfc.dll" from "C:\Program Files\Microsoft SQL Server\100\SDK\Assemblies" will eliminate this error.