Possible Bug with SqlDataAdapter.Fillschema DataColumn.Unique values are not populated.

Question

Hi all,
I have done a lot of searching for answer to this problem this evening and so far have not found a solution but have found multiple people with the same issue.
When using SqlDataAdapter.FillSchema() from a table that contains a Primary Key and columns with Unique constraints the only DataColumn.Unique value to be populated is the Primary Key.
From reading the MSDN entry for dbDataAdapter this is not the intended functionality
Can anyone suggest avenues to try or where to raise this issue if the method truly is not functioning as intended?

Answer 1

Hello HarborneD,
>>When using SqlDataAdapter.FillSchema() from a table that contains a Primary Key and columns with Unique constraints the only DataColumn.Unique value to be populated is the Primary Key.
From your description, it is not very clear how your table is defined, I tried to reproduce this issue with below table(not sure if it is similar with yours, if not, please share it with us):
CREATE TABLE [dbo].[T20141230] (
[ID] INT NOT NULL,
[Name] NCHAR (10) NULL,
[Birthday] DATETIME NULL,
PRIMARY KEY CLUSTERED ([ID] ASC),
CONSTRAINT uc_PersonID UNIQUE ([Name])
And the code used to full the schema:
SqlConnection con = new SqlConnection(@"Server=(localdb)\Projects;Database=ADO.NET;Trusted_Connection=True;");
try
con.Open();
SqlCommand cmd = new SqlCommand("select * from [T20141230]", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.FillSchema(dt, SchemaType.Mapped);
da.Fill(dt);
catch (Exception)
finally
con.Close();
However, I could all columns populated with values from database. I used VS2013, .NET 4.5 and windows 8.1, you could have a try with my demo.
>>Can anyone suggest avenues to try or where to raise this issue if the method truly is not functioning as intended
If it is an exact issue which is not reported yet, you could post it to this site below:
https://connect.microsoft.com/VisualStudio
Regards.
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