// 获取某个定长字段
protected VariableLengthField GetVariableField(string id)
{
VariableLengthField temp = null;
foreach (VariableLengthField field in this.VariableLengthFields)
{
if (field.ID == id)
{
//return field;
temp = field;//2020/8/13 改造，找到最后一个同名字段再返回。
}
}
return(temp);
}
// 将对象转换字符串命令
public virtual string ToText()
{
Debug.Assert(String.IsNullOrEmpty(this.CommandIdentifier) == false, "命令指示符未赋值");
StringBuilder text = new StringBuilder(this.CommandIdentifier);
if (this.FixedLengthFields != null)
{
//foreach (FixedLengthField field in this.FixedLengthFields)
for (int i = 0; i < this.FixedLengthFields.Count; i++)
{
FixedLengthField field = this.FixedLengthFields[i];
if (field.Value == null || field.Value.Length != field.Length)
{
throw new Exception("定长字段[" + field.Name + "]的值为null或者长度不符合定义");
}
text.Append(field.Value);
}
}
if (this.VariableLengthFields != null && this.VariableLengthFields.Count > 0)
{
//foreach (VariableLengthField field in this.VariableLengthFields)
for (int i = 0; i < this.VariableLengthFields.Count; i++)
{
VariableLengthField field = this.VariableLengthFields[i];
if (field.Value != null)
{
text.Append(field.ID + field.Value + SIPConst.FIELD_TERMINATOR);
}
}
}
string result = text.ToString();
// 去掉字符串最后一个|
if (string.IsNullOrEmpty(result) == false)
{
if (result.Substring(result.Length - 1) == SIPConst.FIELD_TERMINATOR)
{
result = result.Substring(0, result.Length - 1);
}
}
return(result);
}
protected string GetVariableFieldValue(string id)
{
VariableLengthField field = this.GetVariableField(id);
if (field == null)
{
// 20170811 jane todo
if (id == "AY" || id == "AZ")
{
return("");
}
throw new Exception("未定义变长字段" + id);
}
return(field.Value);
}
// 设置某个定长字段的值
protected void SetVariableFieldValue(string id, string value)
{
VariableLengthField field = this.GetVariableField(id);
if (field == null)
{
// 20170811 jane todo
if (id == "AY" || id == "AZ")
{
return;
}
throw new Exception("未定义变长字段" + id);
}
// 2020/8/13 如果是重复的字段，先检查字段是否已经赋值，没赋值过则赋值，
// 如果已有值，则新new的一个字段,插在其后（这样可以保证原始的字段顺序）
if (field.IsRepeat == false)
{
field.Value = value;
}
else
{
if (string.IsNullOrEmpty(field.Value) == true)
{
field.Value = value;
}
else
{
VariableLengthField f = new VariableLengthField(id, field.IsRepeat, field.IsRepeat);
f.Value = value;
// 插在其后,不要用增加（这样可以保证原始的字段顺序）
this.VariableLengthFields.Insert(this.VariableLengthFields.IndexOf(field) + 1, f);
//this.VariableLengthFields.Add(f);
}
}
}