public List <T> Query <T>(SqlCondition condition)
{
EntityBase entity = EntityManager.GetEntity(condition.ConnectionName, condition.TableName);
if (entity == null)
{
throw new Exception("Invalid connection or table.");
}
List <string> attrList = new List <string>();
foreach (var attr in entity.Attributes.Keys)
{
if ((condition.FilterWay == FilterWay.FilterOut && !condition.FilterColumns.Contains(attr)) ||
(condition.FilterWay == FilterWay.Keep && condition.FilterColumns.Count == 0) ||
(condition.FilterWay == FilterWay.Keep && condition.FilterColumns.Contains(attr)))
{
attrList.Add(attr);
}
}
string sqlTemplate = "SELECT {0} FROM {1}";
string sqlText = string.Format(sqlTemplate, string.Join(",", attrList), condition.TableName);
if (condition.Expression != null)
{
sqlText += condition.Expression.GenerateSqlText();
}
if (condition.OrderColumns != null && condition.OrderColumns.Count > 0)
{
sqlText = sqlText + string.Format(" ORDER BY {0} ", string.Join(",", condition.OrderColumns)) + condition.OrderBy.ToString();
}
string connStr = SqlServerConnectionProvider.Instance.GetConnectionString(condition.ConnectionName);
return(SqlServerBaseOrder.ExecuteReader <T>(connStr, sqlText));
}
public int Insert <T>(SqlCondition condition, List <T> datas)
{
DataTable dt = new DataTable();
EntityBase entity = EntityManager.GetEntity(condition.ConnectionName, condition.TableName);
if (entity == null)
{
throw new Exception("Invalid connection or table.");
}
Hashtable mappings = new Hashtable();
foreach (var attr in entity.Attributes.Keys)
{
dt.Columns.Add(attr, typeof(T).GetProperty(attr).PropertyType);
mappings.Add(attr, attr);
}
foreach (var data in datas)
{
DataRow dr = dt.NewRow();
foreach (var attr in entity.Attributes.Keys)
{
dr[attr] = data.GetType().GetProperty(attr).GetValue(data);
}
dt.Rows.Add(dr);
}
string connStr = SqlServerConnectionProvider.Instance.GetConnectionString(condition.ConnectionName);
return(SqlServerBaseOrder.ExecuteBulkCopy(connStr, condition.TableName, dt, mappings));
}
public int Insert <T>(SqlCondition condition, T data)
{
EntityBase entity = EntityManager.GetEntity(condition.ConnectionName, condition.TableName);
if (entity == null)
{
throw new Exception("Invalid connection or table.");
}
List <string> attrList = new List <string>();
List <string> paramList = new List <string>();
foreach (var attr in entity.Attributes.Keys)
{
attrList.Add(attr);
paramList.Add(string.Format("@{0}", attr));
}
string sqlTemplate = "INSERT INTO {0}({1})VALUES({2})";
string sqlText = string.Format(sqlTemplate, condition.TableName, string.Join(",", attrList), string.Join(",", paramList));
List <SqlParameter> paras = new List <SqlParameter> {
};
foreach (var attr in entity.Attributes.Keys)
{
paras.Add(this.Convert <T>(entity.Attributes[attr], data));
}
string connStr = SqlServerConnectionProvider.Instance.GetConnectionString(condition.ConnectionName);
return(SqlServerBaseOrder.ExecuteNonQuery(connStr, sqlText, paras.ToArray()));
}
public int Delete(SqlCondition condition)
{
string sqlTemplate = "DELETE FROM {0}";
string sqlText = string.Format(sqlTemplate, condition.TableName);
if (condition.Expression != null)
{
sqlText += condition.Expression.GenerateSqlText();
}
string connStr = SqlServerConnectionProvider.Instance.GetConnectionString(condition.ConnectionName);
return(SqlServerBaseOrder.ExecuteNonQuery(connStr, sqlText));
}
public int Update <T>(SqlCondition condition, T data)
{
EntityBase entity = EntityManager.GetEntity(condition.ConnectionName, condition.TableName);
if (entity == null)
{
throw new Exception("Invalid connection or table.");
}
List <string> attrList = new List <string>();
List <string> expressionList = new List <string>();
foreach (var attr in entity.Attributes.Keys)
{
if ((condition.FilterWay == FilterWay.FilterOut && !condition.FilterColumns.Contains(attr)) ||
(condition.FilterWay == FilterWay.Keep && condition.FilterColumns.Count == 0) ||
(condition.FilterWay == FilterWay.Keep && condition.FilterColumns.Contains(attr)))
{
attrList.Add(attr);
expressionList.Add(string.Format("{0} = @{0}", attr));
}
}
string sqlTemplate = "UPDATE {0} SET {1}";
string sqlText = string.Format(sqlTemplate, condition.TableName, string.Join(",", expressionList));
if (condition.Expression != null)
{
sqlText += condition.Expression.GenerateSqlText();
}
List <SqlParameter> paras = new List <SqlParameter> {
};
foreach (var attr in attrList)
{
paras.Add(this.Convert <T>(entity.Attributes[attr], data));
}
string connStr = SqlServerConnectionProvider.Instance.GetConnectionString(condition.ConnectionName);
return(SqlServerBaseOrder.ExecuteNonQuery(connStr, sqlText, paras.ToArray()));
}
public DbContext(SqlCondition condition)
{
_condition = condition;
}
