How to Change Column Name In DataReader In C#?

Question

I have SqlDataReader that gets returned from a ExecuteDataReader statement.

All I want is: change some column name in the data reader, just before binding to grid.

Here's the situation:

1. First I build the structure Of grid (structure is in the table in database that was filled based on the output of a stored procedure in the system in the past)
2. I execute data reader to execute stored procedure
3. Binding the data reader to the grid

Here is the problem: if one column in the stored procedure is in upper case and related column in the grid is in lower case, the grid does not fill.

And I have a lot of stored procedures based on this architecture. Some of them have many rows to display. And because of that I use data reader for performance.

1. I don't want to change the column name in the stored procedure (too much work)
2. I don't want to copy the result of data reader to another data holder (because of overhead, and low performance)

3. I just one way to change the column name of the data reader

   sqlDataReader reader; reader.executedatareadet();

For example after data reader is returned I have two columns ( A,B ).

I want to change column 'A' to 'a' (convert to lower case) before binding it to the grid like reader.GetName(i)

I want to be able to do something like

reader.SetName(i)

but it seams that we cant change the data reader column name

Answer 1

1. You can change the column names in GridView
2. If possible alter the Stored Procedure with new column names

Answer 2

您可以尝试使用预定义的列名称在DataTable中加载DbDataReader，然后在tout应用程序中将该表用作数据源。

Answer 3

My recommendation here would be: separate the UI and database code. If your UI is affected by a data-reader, then that simply makes me ask: "why is the UI talking to a data-reader?". Those two things are at total opposite ends of the stack. I would abstract that by having your DAL return a concrete list of populated POCO/DTO types (or possibly view-model types), ie

public List<Customer> GetCustomers({some filter etc}) {...}

then bind to that , ie

var customers = dal.GetCustomers(...);
...
someUI.DataSource = customers;

The Customer type is then well defined with properties such as:

public class Customer {
    public int Id {get;set;}
    public string Name {get;set;}
    ...
}

Any implementation changes at the DAL are now completely separated from the UI.