System. The Data. SqlClient. SqlException: "in establishing connection with SQL Server and network or specific instances of the error, or unable to access the Server was not found, please verify the instance name is correct and that SQL Server is configured to allow remote connections, (the provider: Named Pipes provider, error: 40 - unable to open the connection to SQL Server)" Vs2019 version Sql2014 version My program can be run out on other people's computer, run on your computer so this mistake! Help me bai! Save the children!
CodePudding user response:
Open the SQL management tool can you log in? If you can login message posted your connection string
CodePudding user response:
SQL environment, others can not, you have no, can determine the local database on even?
CodePudding user response:
Look at the web. Config files in the database configuration database may be even more is not the same
CodePudding user response:
That there is something wrong with the connection string to connect your database server, copy the code directly to the other environment, remember to modify the connection string
CodePudding user response:
Double database, or code inside the reference library, or web. Config the configuration string conflict,
CodePudding user response:
I can log on to the database! DBHelper was written by my own! Estimation problem is vs and essentially no link
CodePudding user response:
SQL environment I don't know how to install! How to view the environment installed without! This is my web. Config file <? The XML version="1.0" encoding="utf-8"?>
Detailed information on how to configure the ASP.NET application, please visit https://go.microsoft.com/fwlink/? LinkId=169433 - & gt; Type="Microsoft. CodeDom. Will. DotNetCompilerPlatform. CSharpCodeProvider, Microsoft, CodeDom. Will the DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31 bf3856ad364e35" WarningLevel="4" compilerOptions="/langversion: default/nowarn: 1659; 1699; 1701 "/& gt; Type="Microsoft. CodeDom. Will. DotNetCompilerPlatform. VBCodeProvider, Microsoft, CodeDom. Will the DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31 bf3856ad364e35" WarningLevel="4" compilerOptions="/langversion: default/nowarn: 41008/define: _MYTYPE=\ & amp; quot; The Web \ & amp; quot;/optionInfer + "/& gt;
