Attempting to set the column as a parameter in FromRawSql
. Query always returns null, I understand this is because the SQL is compiled before parameter values are set. How can I pass the column name into the query as a parameter?
What I'm trying:
var param = new SqlParameter[] {
new SqlParameter("@col", dataDiscriminator),
new SqlParameter("@value", itemDiscValue)
};
var thisq = context.Devices.FromSqlRaw("SELECT * FROM Devices WHERE @col = @value", param);
var thisDevice = thisq.SingleOrDefault();
Will produce the SQL:
DECLARE @col nvarchar(4) = N'Name';
DECLARE @value nvarchar(26) = N'Registration Template';
SELECT * FROM Devices WHERE @prop = @value
you can not use parameter for table or column name. Try this
var param = new SqlParameter[] {
new SqlParameter("@value", itemDiscValue)
};
var thisq = context.Devices.FromSqlRaw($"SELECT * from Devices WHERE {dataDiscriminator} = @value", param).ToList();
var thisDevice = thisq.SingleOrDefault();
I don' t know where dataDiscriminator data from but always remember about the sql script injections.
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