An SqlParameter with ParameterName '@UserId' is not contained by this SqlParameterCollection

Question

I had a login page. once user successfuly logged in, they can view and manage their profile/information. This would be done by retrieving data from database and display on a

Answer 1

If you already have the parameter listed in your SqlDataSource, then simply point to it and change it's value ...

e.Command.Parameters["@UserId"].Value = currentUserId;

You do not need to create a parameter, unless you have not listed it back in your ASP page.

Answer 2

Create a new SqlParameter and add it to the collection.

SqlParameter param = new SqlParameter("@UserId", currentUserId);
e.Command.Parameters.Add(param);

Answer 3

Try the following:

DbParameter param = e.Command.CreateParameter();
param.ParameterName = "@UserId";
param.Value = currentUserId;
e.Command.Parameters.Add(param);

I didn't test this though

Answer 4

You must add the parameter with

e.Command.Parameters.AddWithValue("@UserId", currentUserId);

Once you have added it you could access it through the indexer as in your example.

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UPDATE

If you are working with the System.Data.Common namespace, the AddWithValue method is not available. You will have to do something like

var param = e.Command.CreateParameter("@UserId", currentUserId);
e.Command.Parameters.Add(param);

This is a little bit more complicated but has the advantage that you do not have to implicitly create a parameter of a specific type like SqlParamter or OleDbParameter.