REST 调用从 Oracle 数据库返回空列表 [英] REST Calls return empty List From Oracle Database
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问题描述
我正在尝试从数据库 (Oracle 11G) 返回列表现在当我直接从 Sql Explorer 运行它时,它返回数据.现在将它放在 REST API 中而不是返回它,它只返回 []
作为结果
I am trying to return List from a Database (Oracle 11G) Now When I run it directly from Sql Explorer, it returns the Data. Now Having it inside the REST API rather than return it, it just returns []
as results
我的代码看起来像这样:
My code Looks something Like this :
public IEnumerable<VaultService> Get(string Branch_Desg)
{
OracleConnection con = new OracleConnection(constr);
con.Open();
DataTable dt = new DataTable();
//string sql = "select from wemadummyvaulttable where branch_desg = '" + Branch_Desg + "'";
string sql = "select BRANCH_ID ,BRANCH_NAME ,BRANCHID_NUMBER ,BRANCH_ACCOUNTNO ,BRANCH_DESG ,CURRENCY ,BRANCH_BALANCE from wemadummyvaulttable where branch_desg = '"+Branch_Desg+"' ";
OracleDataAdapter da = new OracleDataAdapter(sql, con);
List<VaultService> vr = new List<Models.VaultService>(dt.Rows.Count);
if (dt.Rows.Count > 0)
{
foreach (DataRow vaultrecord in dt.Rows)
{
vr.Add(new ReadVaultBal(vaultrecord));
}
}
return vr;
}
稍后我将修复 Sql 注入的部分,我只需要知道我在这里缺少什么以及为什么它返回 Emptyset 而不是 Json 结果
I will fix the part for the Sql injections later, i just need to know what I am Missing here and why its returning an Emptyset rather than Json results
完整代码如下:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using WEMAVaultREST.Models;
using Oracle.ManagedDataAccess.Client;
using Oracle.ManagedDataAccess.Types;
using System.Data;
namespace JBVaultREST.Controllers
{
public class VaultServiceController : ApiController
{
string constr = "User ID=*; Password=*; Data Source=SAM;";
// GET api/<controller>
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
// GET api/<controller>/5
public string Get(int id)
{
return "value";
}
// GET api/<controller>/5
/* public VaultService Get(string Branch_Desg)
{
OracleConnection con = new OracleConnection(constr);
con.Open();
DataTable dt = new DataTable();
string sql = "select * from wemadummyvaulttable where branch_desg = '"+Branch_Desg+"'";
OracleDataAdapter da = new OracleDataAdapter(sql,con);
da.Fill(dt);
if (dt.Rows.Count > 0)
{
return new ReadVaultBal(dt.Rows[0]);
}
throw new Exception("Account not found");
}*/
public IEnumerable<VaultService> Get(string Branch_Desg)
{
OracleConnection con = new OracleConnection(constr);
con.Open();
DataTable dt = new DataTable();
//string sql = "select from wemadummyvaulttable where branch_desg = '" + Branch_Desg + "'";
string sql = "select BRANCH_ID ,BRANCH_NAME ,BRANCHID_NUMBER ,BRANCH_ACCOUNTNO ,BRANCH_DESG ,CURRENCY ,BRANCH_BALANCE from wemadummyvaulttable where branch_desg = '"+Branch_Desg+"' ";
OracleDataAdapter da = new OracleDataAdapter(sql, con);
da.Fill(dt);
List<VaultService> vr = new List<Models.VaultService>(dt.Rows.Count);
if (dt.Rows.Count > 0)
{
foreach (DataRow vaultrecord in dt.Rows)
{
vr.Add(new ReadVaultBal(vaultrecord));
}
}
return vr;
}
// POST api/<controller>
public void Post([FromBody]string value)
{
}
// PUT api/<controller>/5
public void Put(int id, [FromBody]string value)
{
}
// DELETE api/<controller>/5
public void Delete(int id)
{
}
}
}
类看起来像这样
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Web;
using WEMAVaultREST.Models;
namespace JBVaultREST.Models
{
public class VaultService
{
public string Branch_name { get; set; }
public string BranchID_Number { get; set; }
public string Branch_AccountNo { get; set; }
public string Branch_Desg { get; set; }
public string Currency { get; set; }
public decimal Branch_Balance { get; set; }
}
}
public class CreateTransaction : VaultService
{
}
public class ReadVaultBal : VaultService
{
public ReadVaultBal(DataRow row)
{
Branch_name = row["Branch_name"].ToString();
BranchID_Number = row["BranchID_Number"].ToString();
Branch_AccountNo = row["Branch_AccountNo"].ToString();
Branch_Desg = row["Branch_Desg"].ToString();
Currency = row["Currency"].ToString();
Branch_Balance = Convert.ToDecimal(row["Branch_Balance"]);
}
public string Branch_name { get; set; }
public string BranchID_Number { get; set; }
public string Branch_AccountNo { get; set; }
public string Branch_Desg { get; set; }
public string Currency { get; set; }
public decimal Branch_Balance { get; set; }
}
推荐答案
您的代码中缺少 da.Fill(dt);
.
另外,请像这样从查询中删除 ''
.
Also please remove the ''
from the query like this.
string sql = "select BRANCH_ID ,BRANCH_NAME ,BRANCHID_NUMBER ,BRANCH_ACCOUNTNO ,BRANCH_DESG ,CURRENCY ,BRANCH_BALANCE from wemadummyvaulttable where branch_desg = " + Branch_Desg + " ";
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