protected override SqlCaluse SelectMethod(ConstantExpression exp, SqlCaluse sqlCaluse)
{
var p = sqlCaluse.AddDbParameter(exp.Value);
sqlCaluse.SelectMethod.Append(p);
return(sqlCaluse);
}
protected override SqlCaluse Update(MemberInitExpression exp, SqlCaluse sqlCaluse)
{
var bindings = exp.Bindings;
foreach (MemberBinding binding in bindings)
{
if (binding is MemberAssignment memberExp)
{
var name = binding.Member.GetAttribute <ColumnNameAttribute>()?.Name;
var value = Expression.Lambda(memberExp.Expression).Compile().DynamicInvoke();
sqlCaluse += $" {name ?? binding.Member.Name} = ";
sqlCaluse += sqlCaluse.AddDbParameter(value);
sqlCaluse += ",\n";
}
}
if (sqlCaluse.EndWith(",\n"))
{
sqlCaluse.Sql.Remove(sqlCaluse.Sql.Length - 2, 2);
}
return(sqlCaluse);
}
protected override SqlCaluse Update(NewExpression exp, SqlCaluse sqlCaluse)
{
for (int i = 0; i < exp.Members.Count; i++)
{
var member = exp.Members[i];
var arg = exp.Arguments[i];
//var name = member.GetAttribute<ColumnNameAttribute>()?.Name ?? member.Name;
var func = Expression.Lambda(arg).Compile();
var value = func.DynamicInvoke();
if (value == null || value == DBNull.Value)
{
continue;
}
sqlCaluse += $" {member.Name} = ";
sqlCaluse += sqlCaluse.AddDbParameter(value);
sqlCaluse += ",\n";
}
if (sqlCaluse.EndWith(",\n"))
{
sqlCaluse.Sql.Remove(sqlCaluse.Sql.Length - 2, 2);
}
return(sqlCaluse);
}
private string FindValue(MemberExpression exp, SqlCaluse sqlCaluse)
{
if (exp.Expression.NodeType == ExpressionType.Parameter)
{
string tableAlias = sqlCaluse.GetTableAlias(exp.Member.DeclaringType);
var attr = exp.Member.GetAttribute <ColumnNameAttribute>();
if (attr == null)
{
return(" " + tableAlias + exp.Member.Name);
}
else
{
return(" " + tableAlias + attr.Name);
}
}
else
{
//var v = exp.Expression as ConstantExpression;
var v = Expression.Lambda(exp).Compile().DynamicInvoke();
return(sqlCaluse.AddDbParameter(v));
}
}
protected override SqlCaluse Update(MemberExpression exp, SqlCaluse sqlCaluse)
{
var e = Expression.Lambda(exp).Compile().DynamicInvoke();
var eType = e.GetType();
var props = eType.GetProperties();
for (int i = 0; i < props.Length; i++)
{
var p = props[i];
var value = p.GetValue(e, null);
if (value == null || value == default || value == DBNull.Value)
{
continue;
}
if (sqlCaluse.IgnoreFields.Contains(p.Name))
{
continue;
}
if (p.GetAttribute <IgnoreAttribute>() != null)
{
continue;
}
if (p.GetAttribute <PrimaryKeyAttribute>() != null)
{
continue;
}
var name = p.GetAttribute <ColumnNameAttribute>()?.Name;
sqlCaluse += $" {name ?? p.Name} = ";
sqlCaluse += sqlCaluse.AddDbParameter(value);
sqlCaluse += ",\n";
}
if (sqlCaluse.EndWith(",\n"))
{
sqlCaluse.Sql.Remove(sqlCaluse.Sql.Length - 2, 2);
}
return(sqlCaluse);
}
protected override SqlCaluse Insert(MemberExpression exp, SqlCaluse sqlCaluse)
{
var e = Expression.Lambda(exp).Compile().DynamicInvoke();
var eType = exp.Type;
var props = eType.GetProperties();
for (int i = 0; i < props.Length; i++)
{
var p = props[i];
if (p.GetAttribute <IgnoreAttribute>() != null)
{
continue;
}
var value = p.GetValue(e, null);
if (value == null || value == DBNull.Value)
{
continue;
}
var name = p.GetAttribute <ColumnNameAttribute>()?.Name;
sqlCaluse.SelectFields.Add(name ?? p.Name);
sqlCaluse.AddDbParameter(value);
}
return(sqlCaluse);
}
protected override SqlCaluse Where(ConstantExpression exp, SqlCaluse sqlCaluse)
{
sqlCaluse += sqlCaluse.AddDbParameter(exp.Value);
return(sqlCaluse);
}
