private static void AddParameters(ParameterizedQueryBuilder builder, object[] parameters, int begin, int end)
{
for (int parameterIndex = begin; parameterIndex < end; parameterIndex++)
{
AddParameter(builder, parameters[parameterIndex]);
builder.AppendText(",");
}
AddParameter(builder, parameters[end]);
}
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>
/// 将多个参数化查询串联起来并用指定的字符串分隔
/// </summary>
/// <param name="sperator">分隔符</param>
/// <param name="queries">参数化查询</param>
/// <returns>串联后的结果</returns>
public static ParameterizedQuery Join(this string sperator, params ParameterizedQuery[] queries)
{
if (!queries.Any())
{
return(null);
}
var builder = new ParameterizedQueryBuilder();
queries[0].AppendTo(builder);
foreach (var q in queries.Skip(1))
{
builder.AppendText(sperator);
builder.AppendPartial(q);
}
return(builder.CreateQuery());
}
/// <summary>
/// 将多个参数化查询串联起来并用指定的字符串分隔
/// </summary>
/// <param name="sperator">分隔符</param>
/// <param name="queries">参数化查询</param>
/// <returns>串联后的结果</returns>
public static ParameterizedQuery Join(this string sperator, params ParameterizedQuery[] queries)
{
if (queries == null)
{
throw new ArgumentNullException("queries");
}
queries = queries.Where(i => i != null).ToArray();//去除所有为 null 的参数化查询对象
if (!queries.Any())
{
return(null);
}
var builder = new ParameterizedQueryBuilder();
queries[0].AppendTo(builder);
foreach (var q in queries.Skip(1))
{
if (!builder.IsEndWithWhiteSpace() && !char.IsWhiteSpace(sperator[0]) && Db.AddWhiteSpaceOnConcat)
{
builder.Append(' ');
}
builder.AppendText(sperator);
if (!builder.IsEndWithWhiteSpace() && !q.IsStartWithWhiteSpace() && Db.AddWhiteSpaceOnConcat)
{
builder.Append(' ');
}
builder.AppendPartial(q);
}
return(builder.CreateQuery());
}
