/// <summary>
/// 修改一个实例
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="entity">实体</param>
/// <returns>影响行数</returns>
public static int Update <T>(T entity)
{
var type = typeof(T);
var properties = type.GetProperties().Where(p => !GetAttributes(p).OfType <NonFieldAttribute>().Any());
ParameterizedQueryBuilder parms = new ParameterizedQueryBuilder();
StringBuilder strSql = new StringBuilder();
strSql.Append("Update " + type.Name + " set ");
string fields = "";
string primarykey = "";
string primaryvalue = "";
int loop = 0;
foreach (var p in properties)
{
var name = GetFieldname(p);
if (name.IndexOf("OID") == -1)
{
fields += name + "={" + loop + "},";
parms.AppendParameter(p.GetValue(entity, null));
loop++;
}
else
{
primarykey = name;
primaryvalue = p.GetValue(entity, null).ToString();
}
}
strSql.Append(fields.Substring(0, fields.Length - 1) + " where " + primarykey + "=" + primaryvalue);
return(db.T(strSql.ToString(), parms.CreateQuery().ParameterValues).ExecuteNonQuery());
}
/// <summary>
/// 得到Model组成SQL对象
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="entity">实体</param>
/// <returns>Model组成SQL对象</returns>
public static TModel GetInsertTModel <T>(T entity)
{
TModel tmodel = new TModel();
var type = typeof(T);
var properties = type.GetProperties().Where(p => !GetAttributes(p).OfType <NonFieldAttribute>().Any());
ParameterizedQueryBuilder parms = new ParameterizedQueryBuilder();
StringBuilder strSql = new StringBuilder();
strSql.Append("insert into " + type.Name + "(");
string fields = "";
foreach (var p in properties)
{
var name = GetFieldname(p);
if (name.IndexOf("NOID") == -1)
{
fields += name + ",";
parms.AppendParameter(p.GetValue(entity, null));
}
}
strSql.Append(fields.Substring(0, fields.Length - 1) + ") values({...});select @@IDENTITY");
tmodel.SQL = strSql.ToString();
tmodel.ParameterValues = parms.CreateQuery().ParameterValues;
return(tmodel);
}
private static void AddParameter(ParameterizedQueryBuilder builder, object value)
{
var partial = value as IParameterizedQueryPartial;
if (partial == null)
{
var container = value as IDbQueryContainer;
if (container != null)
{
partial = container.Query as IParameterizedQueryPartial;
}
}
if (partial != null)
{
partial.AppendTo(builder);
return;
}
var array = value as Array;
if (array != null)
{
if (array.Length == 0)
{
return;
}
for (int i = 0; i < array.Length - 1; i++)
{
AddParameter(builder, array.GetValue(i));
builder.AppendText(",");
}
AddParameter(builder, array.GetValue(array.Length - 1));
return;
}
builder.AppendParameter(value);
}
/// <summary>
/// 插入多个实例
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="entity">实体</param>
/// <returns>影响行数</returns>
public static int Insert <T>(List <T> entitys)
{
var type = typeof(T);
var properties = type.GetProperties().Where(p => !GetAttributes(p).OfType <NonFieldAttribute>().Any());
int res = 0;
try
{
using (var tran = db.BeginTransaction())
{
foreach (T entity in entitys)
{
ParameterizedQueryBuilder parms = new ParameterizedQueryBuilder();
StringBuilder strSql = new StringBuilder();
strSql.Append("insert into " + type.Name + "(");
string fields = "";
foreach (var p in properties)
{
var name = GetFieldname(p);
if (name.IndexOf("NOID") == -1)
{
fields += name + ",";
parms.AppendParameter(p.GetValue(entity, null));
}
}
strSql.Append(fields.Substring(0, fields.Length - 1) + ") values({...})");
res += tran.T(strSql.ToString(), parms.CreateQuery().ParameterValues).ExecuteNonQuery();
}
tran.Commit();
}
}
catch
{
res = 0;
}
return(res);
}
