private ArgumentListSyntax GetArgumentList(string sourceName, MappingTypeInfo typeInfo, ImmutableDictionary <string, ExpressionSyntax> existingArguments)
{
var arguments = typeInfo
.MemberPairs
.Where(arg => arg.Target != null)
.Select(m => GetArgument(sourceName, m, existingArguments))
.Where(x => x != null)
.ToImmutableList();
var sb = new StringBuilder();
sb.Append("\r\n (\r\n");
for (int i = 0; i < arguments.Count; i++)
{
sb.Append(" " + arguments[i].ToString());
if (i < arguments.Count - 1)
{
sb.Append(",");
}
sb.Append("\r\n");
}
sb.Append(" )");
var tet = sb.ToString();
return(SyntaxFactory.ParseArgumentList(sb.ToString()));
}
public static IMRM CreateMRM(MemberInfo member, MappingTypeInfo mappingTypeInfo)
{
if (mappingTypeInfo.DbValueConverter == null || member.GetMemberType().GetUnderlyingType().IsEnum /* 枚举比较特殊 */)
{
Type type = ClassGenerator.CreateMRMType(member);
IMRM obj = (IMRM)type.GetConstructor(Type.EmptyTypes).Invoke(null);
return(obj);
}
else
{
return(new MRM2(member, mappingTypeInfo.DbValueConverter));
}
}
IDbDataParameter CreateDataParameter(IDbCommand cmd, DbParam param, MappingTypeInfo mappingTypeInfo)
{
IDbDataParameter parameter = cmd.CreateParameter();
parameter.ParameterName = param.Name;
Type parameterType = null;
if (param.Value == null || param.Value == DBNull.Value)
{
parameter.Value = DBNull.Value;
parameterType = param.Type ?? typeof(object);
}
else
{
parameterType = param.Value.GetType();
if (parameterType.IsEnum)
{
parameterType = Enum.GetUnderlyingType(parameterType);
parameter.Value = Convert.ChangeType(param.Value, parameterType);
}
else
{
parameter.Value = param.Value;
}
}
if (param.Precision != null)
{
parameter.Precision = param.Precision.Value;
}
if (param.Scale != null)
{
parameter.Scale = param.Scale.Value;
}
if (param.Size != null)
{
parameter.Size = param.Size.Value;
}
if (param.DbType != null)
{
parameter.DbType = param.DbType.Value;
}
else if (mappingTypeInfo != null)
{
parameter.DbType = mappingTypeInfo.MapDbType;
}
const int defaultSizeOfStringOutputParameter = 4000;/* 当一个 string 类型输出参数未显示指定 Size 时使用的默认大小。如果有需要更大或者该值不足以满足需求，需显示指定 DbParam.Size 值 */
if (param.Direction == ParamDirection.Input)
{
parameter.Direction = ParameterDirection.Input;
}
else if (param.Direction == ParamDirection.Output)
{
parameter.Direction = ParameterDirection.Output;
param.Value = null;
if (param.Size == null && param.Type == UtilConstants.TypeOfString)
{
parameter.Size = defaultSizeOfStringOutputParameter;
}
}
else if (param.Direction == ParamDirection.InputOutput)
{
parameter.Direction = ParameterDirection.InputOutput;
if (param.Size == null && param.Type == UtilConstants.TypeOfString)
{
parameter.Size = defaultSizeOfStringOutputParameter;
}
}
else
{
throw new NotSupportedException(string.Format("ParamDirection '{0}' is not supported.", param.Direction));
}
return(parameter);
}
IDbCommand PrepareCommand(string cmdText, DbParam[] parameters, CommandType cmdType, out List <OutputParameter> outputParameters)
{
outputParameters = null;
IDbCommand cmd = this._dbConnection.CreateCommand();
cmd.CommandText = cmdText;
cmd.CommandType = cmdType;
cmd.CommandTimeout = this._commandTimeout;
if (this.IsInTransaction)
{
cmd.Transaction = this._dbTransaction;
}
if (parameters != null)
{
for (int i = 0; i < parameters.Length; i++)
{
DbParam param = parameters[i];
if (param == null)
{
continue;
}
if (param.ExplicitParameter != null)/* 如果存在创建好了的 IDbDataParameter，则直接用它。同时也忽视了 DbParam 的其他属性 */
{
cmd.Parameters.Add(param.ExplicitParameter);
continue;
}
Type parameterType;
if (param.Value == null || param.Value == DBNull.Value)
{
parameterType = param.Type ?? typeof(object);
}
else
{
parameterType = param.Value.GetType();
if (parameterType.IsEnum)
{
parameterType = Enum.GetUnderlyingType(parameterType);
}
}
IDbDataParameter parameter = null;
MappingTypeInfo mappingTypeInfo = MappingTypeSystem.GetMappingTypeInfo(parameterType);
if (mappingTypeInfo != null && mappingTypeInfo.MappingType != null)
{
parameter = mappingTypeInfo.MappingType.CreateDataParameter(cmd, param);
}
else
{
parameter = this.CreateDataParameter(cmd, param, mappingTypeInfo);
}
cmd.Parameters.Add(parameter);
OutputParameter outputParameter = null;
if (param.Direction == ParamDirection.Output || param.Direction == ParamDirection.InputOutput)
{
outputParameter = new OutputParameter(param, parameter);
if (outputParameters == null)
{
outputParameters = new List <OutputParameter>();
}
outputParameters.Add(outputParameter);
}
}
}
return(cmd);
}