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I have a tiered application. The datalayer makes a call to the database by using a dataset which contains a tableadapter. In the database table there is a field called ID of type UniqueIdentifier. I then create the following query:
select * from tbl where ID=@ID
When i try to preview the results in the dataset designer i receive the error “Failed to convert parameter value from string to guid”.
I tried adding single quotes around the value passed in but didnt work.
Where am i going wrong?
Your column ID is Guid type in your database, but your parameter is a
string.You can convert your parameter to a
SqlGuid:Link : https://msdn.microsoft.com/library/system.data.sqltypes.sqlguid.aspx?f=255&MSPPError=-2147217396