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Upload generic list to database


Upload generic list to database

By : user2953675
Date : November 21 2020, 01:01 AM
around this issue Having done it both ways, my money is on DataTable.
See http://msdn.microsoft.com/en-us/library/ex21zs8x%28v=vs.110%29.aspx
code :
// Create a table with some rows. 
        DataTable newProducts = MakeTable();

        // Create the SqlBulkCopy object.  
        // Note that the column positions in the source DataTable  
        // match the column positions in the destination table so  
        // there is no need to map columns.  
        using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
        {
            bulkCopy.DestinationTableName = 
                "dbo.BulkCopyDemoMatchingColumns";

            try
            {
                // Write from the source to the destination.
                bulkCopy.WriteToServer(newProducts);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }


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How to populate a generic list of objects in C# from SQL database

How to populate a generic list of objects in C# from SQL database


By : user1845088
Date : March 29 2020, 07:55 AM
Hope that helps You have a lot of questions in one question.
Linq2SQL is just an ORM kind of, if you are going that route I'd look at the entity framework (microsoft's orm).
code :
public static class DB {
private static readonly string connectionString = ConfigurationManager.ConnectionStrings[connectionStringName].ConnectionString;
private static readonly DbProviderFactory factory = DbProviderFactories.GetFactory(dataProvider);

public static int Update(string sql)
        {
            using (DbConnection connection = factory.CreateConnection())
            {
                connection.ConnectionString = connectionString;

                using (DbCommand command = factory.CreateCommand())
                {
                    command.Connection = connection;
                    command.CommandText = sql;

                    connection.Open();
                    return command.ExecuteNonQuery();
                }
            }
        }

public static DataTable GetDataTable(string sql)
        {
            using (DbConnection connection = factory.CreateConnection())
            {
                connection.ConnectionString = connectionString;

                using (DbCommand command = factory.CreateCommand())
                {
                    command.Connection = connection;
                    command.CommandType = CommandType.Text;
                    command.CommandText = sql;

                    using (DbDataAdapter adapter = factory.CreateDataAdapter())
                    {
                        adapter.SelectCommand = command;

                        DataTable dt = new DataTable();
                        adapter.Fill(dt);

                        return dt;
                    }
                }
            }
}
public IList<Customer> GetCustomers()
{
    StringBuilder sql = new StringBuilder();
    sql.Append(" SELECT CustomerId, CompanyName, City, Country ");
    sql.Append("   FROM Customer ");

    DataTable dt = Db.GetDataTable(sql.ToString());

    return MakeCustomers(dt);
}
private IList<Customer> MakeCustomers(DataTable dt)
        {
            IList<Customer> list = new List<Customer>();
            foreach (DataRow row in dt.Rows)
                list.Add(MakeCustomer(row));

            return list;
        }
private Customer MakeCustomer(DataRow row)
        {
            int customerId = int.Parse(row["CustomerId"].ToString());
            string company = row["CompanyName"].ToString();
            string city = row["City"].ToString();
            string country = row["Country"].ToString();

            return new Customer(customerId, company, city, country);
        }
Generic List linked with Database using Reflection

Generic List linked with Database using Reflection


By : Matt Royer
Date : March 29 2020, 07:55 AM
To fix this issue I have a class , I GOT IT !!
This is the result, maybe someone needs it !!
code :
public List<UserInfo> GetAllUsers()
{
    List<UserInfo> users = new List<UserInfo>();

    try
    {
        using (SqlConnection sqlConnection = connectionString)
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                cmd.CommandText = "dbo.GetAllUsers";
                cmd.CommandType = CommandType.StoredProcedure;

                cmd.Connection = sqlConnection;
                sqlConnection.Open();

                using (SqlDataReader dataReader = cmd.ExecuteReader())
                {
                    if (dataReader.HasRows)
                    {
                        while (dataReader.Read())
                        {
                            UserInfo user = new UserInfo();
                            PropertyInfo[] pList = typeof(UserInfo).GetProperties();
                            foreach (PropertyInfo pi in pList)
                            {
                                object value = dataReader[pi.Name];
                                if (!value.GetType().Equals(typeof(DBNull)))
                                {
                                    users.GetType().GetProperty(pi.Name, BindingFlags.Public | BindingFlags.Instance).SetValue(user, value, null);
                                }
                            }
                            users.Add(user);
                        }
                    }
                    else
                    {
                        users = null;
                    }
                }
            }
            sqlConnection.Close();
        }
    }


    catch (Exception)
    {
        return null;
    }

    return users;
}
I am using generic handler to upload a image from database,The image will display only when user login ,but i need to di

I am using generic handler to upload a image from database,The image will display only when user login ,but i need to di


By : user3631927
Date : March 29 2020, 07:55 AM
it should still fix some issue I am using generic handler to upload a image from database. The image will display only when user login ,but I need to display it on login page also. Image is not displaying in login page, handler source is called in master page , Add the following to the web.config file:
code :
<location path="ImageHandler.ashx">
  <system.web>
    <authorization>
      <allow users="?" />
      <allow users="*" />
    </authorization>
  </system.web>
</location>
What is difference b/w Generic List and Arraylist, Generic List Vs HashTable, Generic List Vs No Generic?

What is difference b/w Generic List and Arraylist, Generic List Vs HashTable, Generic List Vs No Generic?


By : user3913007
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Basically, generic collections are type-safe at compile time: you specify which type of object the collection should contain, and the type system will make sure you only put that kind of object in it. Furthermore, you don't need to cast the item when you get it out.
As an example, suppose we wanted a collection of strings. We could use ArrayList like this:
Blueimp jQuery File Upload - list images from database

Blueimp jQuery File Upload - list images from database


By : Michael Winick
Date : March 29 2020, 07:55 AM
I wish this help you The listing is done through the get_file_objects method (which uses the scandir method). Replace the scandir with your select query. It then iterates over the result calling the get_file_object method you mentioned. So the get_file_objects is the method you'll want to alter.
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