/// <summary>
/// 对新增和修改的检测
/// 1、是否可为空
/// 2、字符长度
/// 3、数字范围
/// </summary>
/// <param name="datamoudle"></param>
/// <param name="f"></param>
/// <param name="v"></param>
/// <param name="errs"></param>
private void CheckAddOrUpdateFieldValue(
IDataModel datamoudle,
IDataFieldModel f,
object v,
IList <DataModalFieldException> errs)
{
if (!DataValueParase.PassNullValue(f, v))
{
errs.Add(ErrorCreateHelper.CreateFieldIsNullError(f.Name, f.Title));
return;
}
if (f.FieldDbType == System.Data.DbType.String)
{
//字符是否超出最大长度
int mx = f.GetFieldSize();
//等于int.maxvalue则不限制字符大小
if (mx != int.MaxValue)
{
mx = mx * 2; //字符类型在数据库存储均使用nvarchar类型(Unicode:每个字符占两字节)
string vv = (string)v;
if (!string.IsNullOrEmpty(vv))
{
int sl = System.Text.Encoding.Unicode.GetByteCount(vv);
if (sl > mx)
{
errs.Add(ErrorCreateHelper.CreateFieldValueOutOfRangeError(f.Name, f.Title, mx));
return;
}
}
}
}
else
{
//数字是否超出范围
Type fieldType = f.GetClrType();
//数字是否超出范围
NumberType nt = DataValueParase.IsNumberType(fieldType);
if ((nt != NumberType.Unkown) || (fieldType == typeof(DateTime) || fieldType == typeof(TimeSpan)))
{
string exp = f.GetMinMaxExpress();
if (!string.IsNullOrWhiteSpace(exp) && !DataValueParase.IsDbNullValue(v))
{
if (!MinMaxValueHelper.ValueIsInRangle(exp, v))
{
errs.Add(ErrorCreateHelper.CreateFieldValueOutOfRangeError(f.Name, f.Title, exp));
return;
}
}
}
}
}
/// <summary>
/// 添加参数到paramets中去
/// </summary>
/// <param name="paramets">参数集合,返回的参数将添加到该集合中,如果不为空的话</param>
/// <param name="ft">参数后缀,可为为null</param>
/// <param name="field">字段信息</param>
/// <param name="value">行值</param>
/// <returns></returns>
private static DataParamet AppendParamet(List <IDataParamet> paramets, string parhz, IDataFieldModel field, object rowvalue)
{
object value = field.GetModelFieldValue(rowvalue);
value = ConvertFieldValueToDbValue(field, value);
DataParamet p = new DataParamet()
{
Name = GenerateParametName(field.Name, parhz),
Value = value,
ValueType = field.GetClrType()
};
int s = field.GetFieldSize();
if (s > 0)
{
p.ValueSize = s;
}
if (paramets != null)
{
paramets.Add(p);
}
return(p);
}
/// <summary>
/// 创建字段定义的SQL
/// </summary>
/// <param name="field">字段模型</param>
/// <param name="tablesourcename">表名称</param>
/// <param name="stringcollatename">字符排序</param>
/// <returns></returns>
private static string CreateTableFieldSql(
IDataFieldModel field,
string tablesourcename,
string stringcollatename)
{
StringBuilder xx = new StringBuilder();
//添加 "[fieldname]"
xx.Append(MsSqlServerHelper.GetFeildNameInSqlExpress(field.Name));
if (field.IsRowVersion())
{
xx.Append(" [timestamp] NULL");
}
else
{
//添加 " [dbtype]" -> "[fieldname] [dbtype]"
xx.AppendFormat(" [{0}]", DbTypeToSqlDbType(field.FieldDbType).ToString().ToLower());
switch (field.FieldDbType)
{
case System.Data.DbType.AnsiString:
case System.Data.DbType.String:
{
int size = field.GetFieldSize();
if (size <= 0)
{
size = 50;
}
if (size == int.MaxValue)
{
xx.AppendFormat("(max) COLLATE {0}", stringcollatename);
}
else
{
xx.AppendFormat("({0}) COLLATE {1}", size, stringcollatename);
}
//添加 "(size) COLLATE ....." -> "[fieldname] [dbtype](size) COLLATE...."
break;
}
case System.Data.DbType.Decimal:
{
int l = 18;
int dot = 4;
var d = field.GetDecimalDefine();
if (d != null)
{
l = d.DecimalLength;
dot = d.DotLength;
if (l <= 0)
{
l = 18;
}
if (dot < 0)
{
dot = 0;
}
}
//添加 "(length,dotlength)" -> "[fieldname] [dbtype](length,dotlength)"
xx.AppendFormat("({0},{1})", l, dot);
break;
}
case System.Data.DbType.Int16:
case System.Data.DbType.Int32:
case System.Data.DbType.Int64:
{
var g = field.GetDbGeneratedDefine();
if (g != null)
{
//添加 " IDENTITY(start,step)" -> "[fieldname] [dbtype]IDENTITY(start,step)"
xx.AppendFormat(" IDENTITY({0},{1})", g.StartValue, g.Step);
}
break;
}
}
if (field.CanbeNull())
{
xx.Append(" NULL");
}
else
{
xx.Append(" NOT NULL");
}
string defaultvalue = field.GetDefaultValue();
if (!string.IsNullOrEmpty(defaultvalue))
{
xx.AppendFormat(" CONSTRAINT [DF_{0}_{1}_defaultvalue] DEFAULT ({2})", tablesourcename, field.Name, defaultvalue);
}
}
return(xx.ToString());
}