/// <summary>
///
/// </summary>
/// <param name="fieldid"></param>
public void RemoveField(string fieldid)
{
Entity.Table t = (Entity.Table)Table;
var tb = new Data.TableBuilder(t.TableName, this.Server.Connection());
var f = this.Table.Fields.Where(x => x.FieldID == fieldid).FirstOrDefault();
if (f == null)
{
throw new Data.Exception.TableFieldException(this.Table.TableName, fieldid, fieldid + " field dosenot exist");
}
try {
DBColumn c = DBColumn.Column(f.FieldName, f.FieldType, f.Length);
tb.AddDropField(c);
tb.DropColumn();
t.RemoveField(fieldid);
// write function here to remove field from table;
}
catch (System.Exception ex)
{
throw ex;
}
}
/// <summary>
/// table create,alter column ,add column,add primary key
/// </summary>
public void AcceptChanges(bool issync = false)
{
if (this.Table.TableID == "") // new table
{
if (issync == false)
{
Data.TableBuilder tb = new Data.TableBuilder(this.Table.TableName, this.Server.Connection());
foreach (Entity.Field f in Table.Fields)
{
if (f.IsPrimaryKey == true)
{
DBColumn c = DBColumn.Column(f.FieldName, f.FieldType, f.Length);
tb.AddField(c);
tb.AddPrimaryKeyField(c);
}
else if (f.IsNullable == true)
{
tb.AddField(DBColumn.Column(f.FieldName, f.FieldType, f.Length, Tech.Data.DBColumnFlags.Nullable));
}
else
{
tb.AddField(DBColumn.Column(f.FieldName, f.FieldType, f.Length));
}
}
try
{
if (issync == false)
{
tb.Create();
}
((Entity.Table)Table).Save();
//}
}
catch (Data.Exception.TableException ex)
{
throw ex;
}
catch (System.Exception ex)
{
throw ex;
}
}
else
{
((Entity.Table)Table).Save();
}
}
else
{
Data.TableBuilder tb = new Data.TableBuilder(this.Table.TableName, this.Server.Connection());
foreach (Entity.Field f in Table.Fields)
{
if (f.isChanged == true || isKeyUpdated(f))
{
if (f.IsPrimaryKey == true)
{
DBColumn c = DBColumn.Column(f.FieldName, f.FieldType, f.Length);
if (f.FieldID == "")
{
tb.AddField(c);
}
else
{
tb.AlterField(c, f.NewFieldName == null ? "" : f.NewFieldName);
}
DBColumn k = DBColumn.Column(f.NewFieldName == ""? f.FieldName:f.NewFieldName,
f.FieldType,
f.Length,
Tech.Data.DBColumnFlags.PrimaryKey);
tb.AddPrimaryKeyField(c);
}
else if (f.IsNullable == true)
{
DBColumn c = DBColumn.Column(f.FieldName,
f.FieldType,
f.Length,
Tech.Data.DBColumnFlags.Nullable);
if (f.FieldID == "")
{
tb.AddField(c);
}
else
{
tb.AlterField(c, f.NewFieldName == null ? "" : f.NewFieldName);
}
}
//else if (isPrimaryUpdated == true) {
// /// check primary key removed
//}
else
{
DBColumn c = DBColumn.Column(f.FieldName,
f.FieldType,
f.Length);
if (f.FieldID == "")
{
tb.AddField(c);
}
else
{
tb.AlterField(c, f.NewFieldName == null ? "" : f.NewFieldName);
}
}
}
}
try
{
if (tb.getFieldCount() > 0)
{
if (issync == false)
{
tb.AlterTable();
if (tb.getPrimaryFieldCount() == 0 && isPrimaryUpdated == true)
{
tb.DropPrimarykey();
}
}
((Entity.Table)Table).Save();
}
}
catch (Data.Exception.TableException ex)
{
throw ex;
}
catch (System.Exception ex)
{
// tb.DropTable();
// ((Entity.Table)Table).Remove();
throw new System.Exception("due to the error in this transaction, all process rollbacked. Error is," + ex.Message);
}
}
}