Strange, why return this kind of mistake

[Starry]

Strange, why return this kind of mistake？？？

1、When  preview , the  reporting  is  ok .   Such   as   the   first     additional     picture.

2、The   "Silverlight  project"  call   reports ,  then    error .    Such   as     the   second     additional     picture. 

3、The   "Winform  project"   call   reports ,  then    error .    Such   as    the    third      additional     picture. 


What    is    the    reason    causing    the    mistake  ?   Strange , Confused, Puzzled ,  Why,Why,Why???

[Steve]

Hi Starry,

The error message is straight-forward: "In case you use a connection string from the application configuration file (i.e. the class library), make sure the name is correct and the same connection string settings are present in the configuration file of your application as well."

In other words when you have bound your report, a connectionString has been saved in the config file of your class library and it is e.g.:

<connectionStrings>
        <add name="StarryConnectionString"
            connectionString="Server=(local);Database=AdventureWorks;Integrated Security=SSPI;"
            providerName="System.Data.SqlClient" />
    </connectionStrings>

you should copy that connection string to your application configuration file (web.config for a web app or app.config for windows forms app).

Regards,
Steve
the Telerik team

[Starry]

Reports   and   sites   with   different    database ,  so  their   connection  string   should   be different.    Reports has   its special connection string, isn't it?

[Steve]

Hello Starry,

There is nothing special about the connectionString that reports use. When you're using our SqlDataSource Component to connect to data by default it is stored in the application settings. This is what the Report and Data Source Wizards do when instructed to save the selected connection string in the config file.

When the reports are used in your actual application, the ConfigurationManager class would search for the configuration file of the current executing application to resolve your settings and connection strings. You can change the database server and credentials to match those of your live server, but the connectionString name should remain the same.

Regards,
Steve
the Telerik team

[Starry]

Tanks  a  lot...   I myself to study  the  reports  well...    I   have   another   problem  ,   can  you  help  me  see?

http://www.telerik.com/community/forums/silverlight/general-discussions/listbox-control-can-t-choose-one-of-the-items.aspx#2125153