/// <summary>
/// 获取对象的Update语句
/// </summary>
/// <param name="modelORM"></param>
/// <returns></returns>
public static String GetUpdateSql(this IModelORM modelORM)
{
TableNameAttribute tableNameAttribute = Attribute.GetCustomAttribute(modelORM.GetType(), typeof(TableNameAttribute)) as TableNameAttribute;
String tableName = tableNameAttribute?.TableName ?? modelORM.GetType().Name;
StringBuilder columnSql = new StringBuilder($" update {tableName} set ");
StringBuilder whereSql = null;
PropertyInfo[] propertyInfos = modelORM.GetType().GetProperties();
foreach (var proInfo in propertyInfos)
{
IgnoreAttribute ignoreAttribute = Attribute.GetCustomAttribute(proInfo, typeof(IgnoreAttribute)) as IgnoreAttribute;
if (!ignoreAttribute?.IsIgnore ?? true)
{
ColumnNameAttribute columnNameAttribute = Attribute.GetCustomAttribute(proInfo, typeof(ColumnNameAttribute)) as ColumnNameAttribute;
IdentityAttribute identityAttribute = Attribute.GetCustomAttribute(proInfo, typeof(IdentityAttribute)) as IdentityAttribute;
if (identityAttribute?.IsIdentity ?? false)
{
if (whereSql == null)
{
whereSql = new StringBuilder(" where ");
}
else
{
whereSql.Append(" and ");
}
whereSql.Append(columnNameAttribute?.ColumnName ?? proInfo.Name);
whereSql.Append("=");
if (proInfo.PropertyType == typeof(String))
{
whereSql.Append("'" + proInfo.GetValue(modelORM) + "'");
}
else
{
whereSql.Append(proInfo.GetValue(modelORM));
}
}
else
{
columnSql.Append(columnNameAttribute?.ColumnName ?? proInfo.Name);
columnSql.Append("=");
if (proInfo.PropertyType == typeof(String))
{
columnSql.Append("'" + proInfo.GetValue(modelORM) + "'");
}
else
{
columnSql.Append(proInfo.GetValue(modelORM));
}
columnSql.Append(",");
}
}
}
columnSql.Remove(columnSql.Length - 1, 1);
String updateSql = columnSql.ToString() + whereSql?.ToString() + ";";
return(updateSql);
}
/// <summary>
/// 获取对象的删除语句
/// </summary>
/// <param name="modelORM"></param>
/// <returns></returns>
public static String GetDeleteSql(this IModelORM modelORM)
{
TableNameAttribute tableNameAttribute = Attribute.GetCustomAttribute(modelORM.GetType(), typeof(TableNameAttribute)) as TableNameAttribute;
String tableName = tableNameAttribute?.TableName ?? modelORM.GetType().Name;
StringBuilder deleteSql = null;
PropertyInfo[] propertyInfos = modelORM.GetType().GetProperties();
foreach (var proInfo in propertyInfos)
{
IgnoreAttribute ignoreAttribute = Attribute.GetCustomAttribute(proInfo, typeof(IgnoreAttribute)) as IgnoreAttribute;
if (!ignoreAttribute?.IsIgnore ?? true)
{
ColumnNameAttribute columnNameAttribute = Attribute.GetCustomAttribute(proInfo, typeof(ColumnNameAttribute)) as ColumnNameAttribute;
IdentityAttribute identityAttribute = Attribute.GetCustomAttribute(proInfo, typeof(IdentityAttribute)) as IdentityAttribute;
if (identityAttribute?.IsIdentity ?? false)
{
if (deleteSql == null)
{
deleteSql = new StringBuilder($" delete from {tableName} where ");
}
else
{
deleteSql.Append(" and ");
}
deleteSql.Append(columnNameAttribute?.ColumnName ?? proInfo.Name);
deleteSql.Append("=");
if (proInfo.PropertyType == typeof(String))
{
deleteSql.Append("'" + proInfo.GetValue(modelORM) + "'");
}
else
{
deleteSql.Append(proInfo.GetValue(modelORM));
}
}
}
}
String updateSql = deleteSql?.ToString() + ";";
return(updateSql);
}
