/// <summary>
/// 是否忽略检查字段
/// </summary>
/// <param name="field"></param>
/// <param name="rangle"></param>
/// <param name="ranglefieldnames"></param>
/// <returns></returns>
private bool IsIgnoreCheckField(
IDataFieldModel field,
FieldSelectRange rangle,
IEnumerable <string> ranglefieldnames)
{
if (field == null)
{
return(true);
}
if (field.IsRowVersion())
{
return(true);
}
if (field.IsSoftDeleteField())
{
return(true);
}
if (field.GetDbGeneratedDefine() != null)
{
return(true);
}
switch (rangle)
{
case FieldSelectRange.IgnoreFields: //忽略指定的字段
{
//指定字段是否是忽略的字段
return(ranglefieldnames != null && ranglefieldnames.FirstOrDefault(f => string.Equals(f, field.Name, StringComparison.OrdinalIgnoreCase)) != null);
}
case FieldSelectRange.OnlyFields: //仅检测指定的字段
{
//指定的字段是否在指定字段中
//如果不在则返回true,否则返回false
if (ranglefieldnames == null)
{
return(true);
}
return(ranglefieldnames.FirstOrDefault(f => string.Equals(f, field.Name, StringComparison.OrdinalIgnoreCase)) == null);
}
}
return(false);
}
/// <summary>
/// 生成修改数据的Sql表达式
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="updateItem"></param>
/// <param name="updaterange"></param>
/// <param name="updatefields"></param>
/// <param name="paramet"></param>
/// <returns></returns>
internal static string GetUpdateSql <T>(
T updateItem,
FieldSelectRange updaterange,
IEnumerable <string> updatefields,
out IEnumerable <IDataParamet> paramet)
where T : class
{
paramet = null;
if (updateItem == null)
{
throw new ObjectIsNullException(LocalResource.UpdateItem);
}
StringBuilder wheresql = new StringBuilder();
StringBuilder setsql = new StringBuilder();
List <IDataParamet> paramets = new List <IDataParamet>();
IDataModel model = typeof(T).GetDataModel();
string namehz = GetIdKeyStringValues(updateItem, model);
int c = 0;
foreach (var k in model.PrimaryKeys)
{
IDataFieldModel f = model.Fields[k.Name];
DataParamet p = AppendParamet(paramets, namehz, f, updateItem);
if (c == 0)
{
wheresql.Append(string.Format("[{0}]={1}", f.Name, p.Name));
}
else
{
wheresql.Append(string.Format(" AND [{0}]={1}", f.Name, p.Name));
}
c++;
}
if (wheresql.Length == 0) //没有任何主键信息
{
throw new NotFoundPrimaryKeyException(typeof(T));
}
IDataFieldModelCollection fields = model.Fields;
c = 0;
foreach (var f in fields)
{
if (f.IsRowVersion())
{
continue;
}
if (f.GetDbGeneratedDefine() != null)
{
continue;
}
if (f.IsPrimaryKey() != null)
{
continue;
}
switch (updaterange)
{
case FieldSelectRange.All: break;
case FieldSelectRange.OnlyFields:
{
if (updatefields == null)
{
continue;
}
if (updatefields.FirstOrDefault(
ff => string.Equals(ff, f.Name, StringComparison.OrdinalIgnoreCase)) == null)
{
continue;
}
break;
}
case FieldSelectRange.IgnoreFields:
{
if (updatefields != null)
{
if (updatefields.FirstOrDefault(
ff => string.Equals(ff, f.Name, StringComparison.OrdinalIgnoreCase)) != null)
{
continue;
}
}
break;
}
}
DataParamet p = AppendParamet(paramets, namehz, f, updateItem);
if (c == 0)
{
setsql.AppendLine(string.Format("[{0}]={1}", f.Name, p.Name));
}
else
{
setsql.AppendLine(string.Format(",[{0}]={1}", f.Name, p.Name));
}
c++;
}
if (setsql.Length == 0)
{
return(null);
}
paramet = paramets.ToArray();
return(string.Format("UPDATE [{0}] SET {1} WHERE {2}", model.Name, setsql.ToString(), wheresql.ToString()));
}
/// <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());
}
