protected override bool ConditionsIsEnough(IContextMessage contextMessage)
{
if (_dbConnection == null)
{
contextMessage.AddError("数据库连接对象为空。");
return(false);
}
try
{
_dbConnection.Open();
}
catch (Exception ex)
{
contextMessage.AddError(ex.Message);
return(false);
}
try
{
_metadata = new BudGISMetadata();
}
catch (Exception ex)
{
contextMessage.AddError(ex.Message);
return(false);
}
return(true);
}
public virtual void Build(IDbConnection connection, BudGISMetadata metadata, IProgressTracker tracker, params object[] args)
{
IDbTransaction tran = connection.BeginTransaction();
try
{
using (IDbCommand cmd = connection.CreateCommand())
{
cmd.Transaction = tran;
cmd.CommandType = CommandType.Text;
//
int steps = 0;
if (tracker != null)
{
tracker.StartTracking("开始创建元数据表...", 3);
}
//Create Tables
CreateTables(connection, metadata, cmd, tracker, ref steps);
}
//
tran.Commit();
}
catch (Exception ex)
{
tran.Rollback();
throw ex;
}
}
public virtual void Clear(IDbConnection connection, BudGISMetadata metadata, bool isClearDataTables, IProgressTracker tracker)
{
IDbTransaction tran = connection.BeginTransaction();
try
{
using (IDbCommand cmd = connection.CreateCommand())
{
cmd.Transaction = tran;
cmd.CommandType = CommandType.Text;
if (tracker != null)
{
tracker.StartTracking("开始清空空间数据库...", 4);
}
//Clear dataTables
if (isClearDataTables)
{
if (tracker != null)
{
tracker.Tracking("正在清空数据表...", 0);
}
ClearDataTables(connection, cmd);
}
//drop BGIS_FeatureClass
if (tracker != null)
{
tracker.Tracking("正在删除系统表\"BGIS_FeatureClass\"...", 1);
}
cmd.CommandText = "drop table BGIS_FeatureClass";
cmd.ExecuteNonQuery();
//drop BGIS_FeatureDataset
if (tracker != null)
{
tracker.Tracking("正在删除系统表\"BGIS_FeatureDataset\"...", 2);
}
cmd.CommandText = "drop table BGIS_FeatureDataset";
cmd.ExecuteNonQuery();
//drop BGIS_Map
if (tracker != null)
{
tracker.Tracking("正在删除系统表\"BGIS_Map\"...", 3);
}
cmd.CommandText = "drop table BGIS_Map";
cmd.ExecuteNonQuery();
}
//
tran.Commit();
}
catch (Exception ex)
{
tran.Rollback();
throw ex;
}
}
private void CreateTables(IDbConnection connection, BudGISMetadata metadata, IDbCommand cmd, IProgressTracker tracker, ref int steps)
{
if (metadata.Tables == null || metadata.Tables.Length == 0)
{
throw new ArgumentNullException("空间数据库元数据配置对象错误,元数据表为空。");
}
foreach (SystemTable table in metadata.Tables)
{
if (tracker != null)
{
tracker.Tracking("正在创建\"" + table.Name + "...", steps);
}
CreateTables(connection, table, cmd);
steps++;
}
}