private static DateTime CreateTableTime = DateTime.MinValue; //最后一次创建表的时间
#region IDb 成员
public void CreateTable(Table table, string tableName)
{
CreateTableTime = DateTime.Now;
if (tableName == null || tableName.Length == 0)
{
tableName = table.Code;
}
DAO.DBEngine daoDBE = new DAO.DBEngine();
DAO.Database daoDB = null;
daoDB = daoDBE.OpenDatabase(this.FileName, false, false, "MS ACCESS;PWD=" + this.Password);
DAO.TableDefs daoTables = daoDB.TableDefs;
foreach (DAO.TableDef daoT in daoDB.TableDefs)
{
if (daoT.Name.Equals(tableName))
{
daoTables.Delete(tableName); //删除现存的表
}
}
DAO.TableDef daoTable = daoDB.CreateTableDef(tableName, 0, "", "");
string strPrimaryKeyFields = "";
foreach (Column _Column in table.Columns)
{
DAO.Field daoField = new DAO.Field();
daoField.Name = _Column.Code;
switch (_Column.DataType)
{
case DataTypeOptions.Int:
daoField.Type = Convert.ToInt16(DAO.DataTypeEnum.dbLong);
break;
case DataTypeOptions.Long:
case DataTypeOptions.Decimal:
daoField.Type = Convert.ToInt16(DAO.DataTypeEnum.dbDouble);
break;
case DataTypeOptions.VarChar:
if (_Column.DataLength > 255)
{
daoField.Type = Convert.ToInt16(DAO.DataTypeEnum.dbMemo);
daoField.AllowZeroLength = true;
}
else
{
daoField.Type = Convert.ToInt16(DAO.DataTypeEnum.dbText);
daoField.Size = _Column.DataLength;
daoField.AllowZeroLength = true;
}
break;
case DataTypeOptions.Text:
daoField.Type = Convert.ToInt16(DAO.DataTypeEnum.dbMemo);
daoField.AllowZeroLength = true;
break;
case DataTypeOptions.File:
daoField.Type = Convert.ToInt16(DAO.DataTypeEnum.dbLongBinary);
break;
default:
throw new Exception("尚未实现的数据类型 " + _Column.DataType);
}
daoField.Required = _Column.IsNotNull;
if (_Column.IsPrimaryKey)
{
strPrimaryKeyFields += _Column.Code + ";";
}
daoTable.Fields.Append(daoField);
}
daoDB.TableDefs.Append(daoTable);
if (table.Name != null && table.Name.Length > 0)
{
DAO.Property daoTableProperty = daoTable.CreateProperty("Description", DAO.DataTypeEnum.dbText, table.Name, 0);
daoTable.Properties.Append(daoTableProperty);
}
foreach (Column _Column in table.Columns)
{
if (_Column.Name != null && _Column.Name.Length > 0)
{
DAO.Field daoField = daoTable.Fields[_Column.Code];
DAO.Property daoColumnProperty = daoField.CreateProperty("Description", DAO.DataTypeEnum.dbText, _Column.Name, 0);
daoField.Properties.Append(daoColumnProperty);
}
}
if (strPrimaryKeyFields.Length > 0)
{
DAO.Index daoIndex = daoTable.CreateIndex("PK_" + tableName);
daoIndex.Fields = strPrimaryKeyFields;
daoIndex.Primary = true;
daoIndex.Unique = true;
daoTable.Indexes.Append(daoIndex);
}
foreach (Index _Index in table.Indexs)
{
string strKeyFields = "";
foreach (Column _KeyColumn in _Index.Columns)
{
strKeyFields += "+" + _KeyColumn.Code + ";";
}
if (strKeyFields.Length > 0)
{
DAO.Index daoIndex = daoTable.CreateIndex(_Index.Code);
daoIndex.Fields = strKeyFields;
daoIndex.Primary = false;
daoIndex.Unique = false;
daoTable.Indexes.Append(daoIndex);
}
}
daoDB.Close();
TimeSpan ts = DateTime.Now - CreateTableTime;
if (ts.Seconds < 2)
{
System.Threading.Thread.Sleep(10000); //Access 数据表创建后需要一段时间才能访问。
}
}
