public void CreateColumn(DatabaseColumnInfo column)
{
if (column == null)
throw new ArgumentNullException("column");
DataContext.DatabaseColumnInfoes.Add(column);
DataContext.SaveChanges();
}
public void DeleteColumn(DatabaseColumnInfo column)
{
if (column == null)
throw new ArgumentNullException("column");
DataContext.Entry<DatabaseColumnInfo>(column).State = System.Data.EntityState.Deleted;
DataContext.SaveChanges();
}
public void InitialTable(int tableId, string connectionString)
{
if (string.IsNullOrEmpty(connectionString))
throw new ArgumentNullException("connectionString");
var tableinfo = DataContext.DatabaseTableInfoes.Where(i => i.ID == tableId).FirstOrDefault();
if (tableinfo == null)
throw new ArgumentNullException("找不到指定的表信息。");
//get columns info
var columninfos = DBHelper.GetAllColumnInformation(connectionString, tableinfo.Name);
var columns = DataContext.DatabaseColumnInfoes.Where(i => i.DatabaseTableInfoID == tableId);
foreach (var item in columninfos)
{
if (columns.Count(i => i.Name == item.Name) == 0)
{
DatabaseColumnInfo column = new DatabaseColumnInfo();
column.CanNull = item.CanNull;
column.ChineseName = item.Remark;
column.CreationTime = DateTime.Now;
column.DatabaseTableInfoID = tableId;
column.DataType = item.DataType;
column.DefaultValue = item.DefaultValue;
column.IsIdentity = item.IsIdentity;
column.IsPrimaryKey = item.IsPK;
column.LastUpdateTime = DateTime.Now;
column.Length = item.Length;
column.Name = item.Name;
this.CreateColumn(column);
}
}
}