/// <summary>
/// 实体生成删除语句
/// </summary>
/// <param name="tableName">表名称</param>
/// <param name="primaryKeyName">主键名称</param>
/// <param name="primaryKeyValue">主键值</param>
private void Delete(string tableName, string primaryKeyName, object primaryKeyValue)
{
if (string.IsNullOrEmpty(tableName))
{
throw new ArgumentNullException("参数 tableName 不能为null");
}
if (string.IsNullOrEmpty(primaryKeyName))
{
throw new ArgumentNullException("参数 primaryKeyName 不能为null");
}
if (primaryKeyValue == null)
{
throw new ArgumentNullException("参数 primaryKeyValue 不能为null");
}
// Do it
Sql = new Sql(string.Format("DELETE FROM {0} WHERE {1}=@0", RuleProvider.Rule(_dbType).EscapeTableName(tableName), RuleProvider.Rule(_dbType).EscapeSqlIdentifier(primaryKeyName)), primaryKeyValue);
}
/// <summary>
/// 实体生成插入语句
/// </summary>
/// <param name="poco">poco实体</param>
public void Insert(object poco)
{
try
{
if (poco == null)
{
throw new Exception("输入参数 poco 不能为空！");
}
Type type = poco.GetType();
var names = new List <string>();
var values = new List <string>();
var paras = new List <object>();
var index = 0;
foreach (PropertyInfo pi in type.Properties())
{
// Don't insert result columns
if (pi.GetCustomAttributes(typeof(ResultColumnAttribute), false).Length > 0)
{
continue;
}
names.Add(RuleProvider.Rule(_dbType).EscapeSqlIdentifier(pi.Name));
values.Add(string.Format("{0}{1}", "@", index++));
paras.Add(poco.GetPropertyValue(pi.Name));
}
string outputClause = String.Empty;
Sql = new Sql(string.Format("INSERT INTO {0} ({1}){2} VALUES ({3})",
RuleProvider.Rule(_dbType).EscapeTableName(type.Name),
string.Join(",", names.ToArray()),
outputClause,
string.Join(",", values.ToArray())
), paras.ToArray());
}
catch (Exception x)
{
throw x;
}
}
/// <summary>
/// 实体生成更新语句
/// </summary>
/// <param name="tableName">表名称</param>
/// <param name="primaryKeyName">主键名称</param>
/// <param name="poco">poco实体</param>
/// <param name="primaryKeyValue">主键值</param>
/// <param name="columns">更新的列名</param>
private void ExecuteUpdate(string tableName, string primaryKeyName, object poco, object primaryKeyValue, params string[] columns)
{
try
{
var sb = new StringBuilder();
var index = 0;
var paras = new List <object>();
if (columns == null || columns.Length < 1)
{
Type type = poco.GetType();
foreach (PropertyInfo pi in type.Properties())
{
// Don't update result columns
if (pi.GetCustomAttributes(typeof(ResultColumnAttribute), false).Length > 0)
{
continue;
}
// Don't update the primary key, but grab the value if we don't have it
if (string.Compare(pi.Name, primaryKeyName, true) == 0)
{
if (primaryKeyValue == null)
{
primaryKeyValue = poco.GetPropertyValue(pi.Name);
}
continue;
}
// Build the sql
if (index > 0)
{
sb.Append(", ");
}
sb.AppendFormat("{0} = {1}{2}", RuleProvider.Rule(_dbType).EscapeSqlIdentifier(pi.Name), "@", index++);
// Store the parameter in the command
paras.Add(poco.GetPropertyValue(pi.Name));
}
}
else
{
foreach (var colname in columns)
{
// Build the sql
if (index > 0)
{
sb.Append(", ");
}
sb.AppendFormat("{0} = {1}{2}", RuleProvider.Rule(_dbType).EscapeSqlIdentifier(colname), "@", index++);
// Store the parameter in the command
paras.Add(poco.GetPropertyValue(colname));
}
// Grab primary key value
if (primaryKeyValue == null)
{
primaryKeyValue = poco.GetPropertyValue(primaryKeyName);
}
}
//添加主键参数
paras.Add(primaryKeyValue);
Sql = new Sql(string.Format("UPDATE {0} SET {1} WHERE {2} = {3}{4}",
RuleProvider.Rule(_dbType).EscapeTableName(tableName), sb.ToString(), RuleProvider.Rule(_dbType).EscapeSqlIdentifier(primaryKeyName), "@", index++), paras.ToArray());
}
catch (Exception x)
{
throw x;
}
}
