向SQL Server 2008 R2表中添加了一些列，但是当网页查询该表时它不会显示

Question

I've added some columns to a table in SQL Server 2008 R2. I then put some default values into these columns. Then I selected these columns with a query which produced the expected results in the output box. My issue is when I use the following lines of code

if (ds.Tables[0].Rows[0]["abc"].ToString().Trim() == "")
{
    this.abcHyperLink.ForeColor = Color.FromArgb(100, 100, 100);
}
else
{
   this.abcHyperLink.NavigateUrl = ds.Tables[0].Rows[0]["abc"].ToString();
}

to query the new columns, it produces this error message

Column 'abc' does not belong to table Table.

When I use the same code with old columns, the code works fine and retrieves the correct data.

Why can't I query the new columns but I can with the old columns? Is there something else I have to do the new columns before I can query it with the code? Your help is much appreciated

EDIT:

The SQL query to check if the new columns were added is

Select [abc],[xyy]
from [database].[dbo].[table]

EDIT2: The app calls

public DataSet GetDataSet()
{
    string sql = "use [name of db] exec sp_search_by '" + this.searchString + "'";
    DataLayer dataLayer = new DataLayer();
    return dataLayer.GetDataSet(sql, "BCITConn");
}

which calls

public DataSet GetDataSet(string sql, string db)
{
    string providerName = ConfigurationManager.ConnectionStrings[db].ProviderName;
    DbProviderFactory factory = DbProviderFactories.GetFactory(providerName);
    DbConnection dbConnection = new SqlConnection();
    try
    {
        dbConnection = factory.CreateConnection();
        dbConnection.ConnectionString = ConfigurationManager.ConnectionStrings[db].ToString();
        DbCommand dbCommand = factory.CreateCommand();
        dbCommand.CommandText = sql;
        dbCommand.CommandTimeout = 2000;
        dbCommand.Connection = dbConnection;
        DbDataAdapter dbDataAdapter = factory.CreateDataAdapter();
        dbDataAdapter.SelectCommand = dbCommand;
        DataSet dataSet = new DataSet();
        dbDataAdapter.Fill(dataSet);
        dbConnection.Close();
        dbConnection.Dispose();
        return dataSet;
    }
    catch (DbException ex)
    {
        Console.WriteLine(ex.ToString());
    }
    finally
    {
        if (dbConnection != null)
        {
            dbConnection.Close();
            dbConnection.Dispose();
        }
    }
    return null;
}

which uses

<connectionStrings>
    <add name="BCITConn" connectionString="Data Source=[correct]; Initial Catalog=[name of db];User ID=[correct];Password=[correct]; Max Pool Size=1000000; pooling=true" providerName="System.Data.SqlClient"/>
</connectionStrings>

from the web config

Answer 1

我唯一能想到的是您正在查询的列未呈现，或者您没有在查询中提及您的列。