public DbStructContainer Modify <T>(T obj) where T : class, new()
{
string query = string.Empty;
DbStructContainer container = TryGetTableFields(obj);
if (container == null)
{
return(container);
}
container.OperateType = 3;
DbFieldBase[] oFields = container.SQLFields;
string[] keyvalues = new string[oFields.Length];
for (int i = 0; i < oFields.Length; i++)
{
DbFieldBase oBaseField = oFields[i];
string sValue = oBaseField.Value == null ? string.Empty : oBaseField.Value.ToString();
sValue = sValue.Replace("\"", "__SY__"); // 为了防止数据内容因为引号导致无法输入, 故此进行引号转换
keyvalues[i] = string.Format("{0}=\"{1}\"", oBaseField.FieldName, sValue);
}
string sKeyValues = string.Join(",", keyvalues);
container.SQLQuery = string.Format("update {0} set {1} where Guid=\"{2}\"", container.SQLTable, sKeyValues, container.SQLFields[container.SQLFields.Length - 1].Value); // 基类的Guid在最后一位，故而这里使用.Length - 1
return(container);
}
public DbStructContainer TryGetTableFields(object obj)
{
string sSQLTable = string.Empty;
DbStructContainer container = null;
List <DbFieldBase> oFieldList = new List <DbFieldBase>();
Type type = obj.GetType();
object[] oSaveDBAttributes = type.GetCustomAttributes(typeof(DbAttribute), false);
if (oSaveDBAttributes.Length > 0)
{
sSQLTable = (oSaveDBAttributes[0] as DbAttribute).TableName;
FieldInfo[] fieldInfos = type.GetFields();
for (int i = 0; i < fieldInfos.Length; i++)
{
FieldInfo fieldInfo = fieldInfos[i];
object[] oFieldUnSaveDBAttributes = fieldInfo.GetCustomAttributes(typeof(DbUnsaveAttribute), false);
if (oFieldUnSaveDBAttributes.Length == 0)
{
DbFieldBase oField = mConvert.Type2Object(fieldInfo.FieldType);
oField.FieldName = fieldInfo.Name;
oField.Value = fieldInfo.GetValue(obj);
oFieldList.Add(oField);
}
}
container = new DbStructContainer();
container.SQLTable = sSQLTable;
container.SQLFields = oFieldList.ToArray();
}
return(container);
}
public DbStructContainer Insert <T>(T obj) where T : class, new()
{
string query = string.Empty;
DbStructContainer container = TryGetTableFields(obj);
if (container == null)
{
return(container);
}
container.OperateType = 2;
DbFieldBase[] oFields = container.SQLFields;
string[] fields = new string[oFields.Length];
string[] values = new string[oFields.Length];
for (int i = 0; i < oFields.Length; i++)
{
DbFieldBase oBaseField = oFields[i];
fields[i] = oBaseField.FieldName;
string sValue = oBaseField.Value == null ? string.Empty : oBaseField.Value.ToString();
sValue = sValue.Replace("\"", "__SY__"); // 为了防止数据内容因为引号导致无法输入, 故此进行引号转换
values[i] = "\"" + sValue + "\"";
}
string sFields = string.Join(",", fields);
string sValues = string.Join(",", values);
container.SQLQuery = string.Format("insert into {0}({1}) values ({2})", container.SQLTable, sFields, sValues);
return(container);
}
public override void OnReader(DatabaseReader reader)
{
IList <T> list = new List <T>();
if (reader == null)
{
return;
}
DbStructure.DbStructContainer[] containers = new DbStructure.DbStructContainer[reader.ElementCount];
for (int i = 0; i < containers.Length; i++)
{
DbStructure.DbStructContainer tmpConatiner = new DbStructure.DbStructContainer();
tmpConatiner.CopyFrom(Container);
containers[i] = tmpConatiner;
}
int index = 0;
foreach (var item in reader)
{
DbStructure.DbStructContainer tmpContainer = containers[index];
DatabaseReader.DatabaseElement oElement = item as DatabaseReader.DatabaseElement;
for (int i = 0; i < reader.FieldCount; i++)
{
tmpContainer.SQLFields[i].Value = oElement.GetValue(i);
}
index = index + 1;
}
for (int tmpIndex = 0; tmpIndex < containers.Length; tmpIndex++)
{
DbStructure.DbStructContainer tmpContainer = containers[tmpIndex];
T t = new T();
FieldInfo[] fieldInfos = t.GetType().GetFields();
for (int i = 0; i < fieldInfos.Length; i++)
{
FieldInfo fieldInfo = fieldInfos[i];
DbFieldBase oBaseField = SearchField(tmpContainer.SQLFields, fieldInfo.Name);
if (oBaseField != null)
{
try
{
fieldInfo.SetValue(t, Convert.ChangeType(oBaseField.Value, fieldInfo.FieldType));
}
catch (Exception e)
{
App.Error("设置参数出现异常! 表{0} 索引位置{1}, 列名{2} 异常：{3}", Container.SQLTable, i, oBaseField.FieldName, e);
}
}
}
list.Add(t);
Obj = list;
}
}
public void CopyFrom(DbStructContainer container)
{
SQLTable = container.SQLTable;
SQLQuery = container.SQLQuery;
SQLFields = new DbFieldBase[container.SQLFields.Length];
for (int i = 0; i < SQLFields.Length; i++)
{
DbFieldBase oBaseField = new DbFieldBase();
oBaseField.CopyFrom(container.SQLFields[i]);
SQLFields[i] = oBaseField;
}
}
protected DbFieldBase SearchField(DbFieldBase[] oBaseFields, string oCondName)
{
for (int i = 0; i < oBaseFields.Length; i++)
{
DbFieldBase oBaseField = oBaseFields[i];
if (oBaseField.FieldName.Equals(oCondName))
{
return(oBaseField);
}
}
return(null);
}
public DbFieldBase Type2Object(Type fieldType)
{
DbFieldBase oField = null;
if (fieldType == typeof(Boolean))
{
oField = new DbBooleanField();
}
else if (fieldType == typeof(Int16))
{
oField = new DbInt16Field();
}
else if (fieldType == typeof(Int32))
{
oField = new DbInt32Field();
}
else if (fieldType == typeof(Int64))
{
oField = new DbInt64Field();
}
else if (fieldType == typeof(UInt16))
{
oField = new DbUInt16Field();
}
else if (fieldType == typeof(UInt32))
{
oField = new DbUInt32Field();
}
else if (fieldType == typeof(UInt64))
{
oField = new DbUInt64Field();
}
else if (fieldType == typeof(Single))
{
oField = new DbSingleField();
}
else if (fieldType == typeof(Double))
{
oField = new DbDoubleField();
}
else if (fieldType == typeof(String))
{
oField = new DbStringField();
}
return(oField);
}
public DbFieldBase Type2Object(string strType)
{
DbFieldBase oField = null;
if (strType.Equals(typeof(Boolean).Name))
{
oField = new DbBooleanField();
}
else if (strType.Equals(typeof(Int16).Name))
{
oField = new DbInt16Field();
}
else if (strType.Equals(typeof(Int32).Name))
{
oField = new DbInt32Field();
}
else if (strType.Equals(typeof(Int64).Name))
{
oField = new DbInt64Field();
}
else if (strType.Equals(typeof(UInt16).Name))
{
oField = new DbUInt16Field();
}
else if (strType.Equals(typeof(UInt32).Name))
{
oField = new DbUInt32Field();
}
else if (strType.Equals(typeof(UInt64).Name))
{
oField = new DbUInt64Field();
}
else if (strType.Equals(typeof(Single).Name))
{
oField = new DbSingleField();
}
else if (strType.Equals(typeof(Double).Name))
{
oField = new DbDoubleField();
}
else if (strType.Equals(typeof(String).Name))
{
oField = new DbStringField();
}
return(oField);
}
public override void OnReader(DatabaseReader reader)
{
if (reader == null)
{
Obj = default(T);
}
if (reader.ElementCount <= 0)
{
Obj = default(T);
}
foreach (var item in reader)
{
DatabaseReader.DatabaseElement oElement = item as DatabaseReader.DatabaseElement;
for (int i = 0; i < reader.FieldCount; i++)
{
Container.SQLFields[i].Value = oElement.GetValue(i);
}
break; // Search 限定只查询一个数据，因此这里执行一次后直接返回
}
FieldInfo[] fieldInfos = Obj.GetType().GetFields();
for (int i = 0; i < fieldInfos.Length; i++)
{
FieldInfo fieldInfo = fieldInfos[i];
DbFieldBase oBaseField = SearchField(Container.SQLFields, fieldInfo.Name);
if (oBaseField != null)
{
try
{
fieldInfo.SetValue(Obj, Convert.ChangeType(oBaseField.Value, fieldInfo.FieldType));
}
catch (Exception e)
{
App.Error("设置参数出现异常! 表{0} 索引位置{1}, 列名{2} 异常：{3}", Container.SQLTable, i, oBaseField.FieldName, e);
}
}
}
}
public void CopyFrom(DbFieldBase oBaseField)
{
FieldName = oBaseField.FieldName;
TypeName = oBaseField.TypeName;
Value = oBaseField.Value;
}
