1
我在WCF(c#)中创建了一个简单的RESTful应用程序。当我使用(GET)填充时,我收到此错误RESTful - WCF - 对象引用未设置为对象的实例
“对象引用未设置为对象的实例”。
我收到了target.DocumentLines[0].itemCode = "";
部分的错误。
这里是我的代码:
public PRRequestData[] getAllPR()
{
List<PRRequestData> list = new List<PRRequestData>();
try
{
string sqlSelect = "SELECT DocEntry, Comments, ReqDate FROM OPRQ";
APP.strCommand = sqlSelect;
DataTable dt = new DataTable();
dt = APP.Ds.Tables[0];
foreach (DataRow row in dt.Rows)
{
// Person target = Activator.CreateInstance();
PRRequestData target = new PRRequestData();
target.requiredDate = row["ReqDate"].ToString();
target.remarks = row["Comments"].ToString();
target.docEntry = row["DocEntry"].ToString();
// DataColumnAttribute.Bind(row,target);
sqlSelect = "SELECT ItemCode, Quantity, Price, VendorNum, TaxCode FROM PRQ1 WHERE DocEntry = '" + row["DocEntry"].ToString() + "' ";
APP.strCommand = sqlSelect;
for (var i = 0; i < APP.Ds.Tables[0].Rows.Count; i++)
{
target.DocumentLines[0].itemCode = "";
}
list.Add(target);
}
return list.ToArray();
}
catch (Exception e)
{
e.ToString();
}
return list.ToArray();
这里是我的DataContract源代码也:
[DataContract(Namespace = "")]
public class PRRequestData
{
[DataMember]
public string docEntry { get; set; }
[DataMember]
public string remarks { get; set; }
[DataMember]
public string requiredDate { get; set; }
//[DataMember]
//public int rowcount { get; set; }
[DataMember]
public RequestDataDetails[] DocumentLines;
}
[DataContract]
public class RequestDataDetails
{
[DataMember]
public string itemCode { get; set; }
[DataMember]
public decimal quantity { get; set; }
[DataMember]
public decimal price { get; set; }
[DataMember]
public string supplier { get; set; }
[DataMember]
public string taxcode { get; set; }
}
看起来像是target.DocumentLines [0]或target.DocumentLines为空,您是否尝试过调试? –
是的,已经做到了。我想要做的是将数据设置为DocumentLines的DataMember。 –