Winform调用WebApi接口实现增删改查CRUD实例源码
作者:作者不详  发布日期:2020/02/26 18:35:56
  Winform调用WebApi接口实现增删改查CRUD实例源码

下面讲解Winform界面怎样调用WebApi接口实现增、删、改、查（CRUD），下图是CSFramework.WebApi后端开发框架测试程序主界面，以单表数据操作界面演示(Customer:客户管理）为例进行讲解。

Winform调用WebApi接口实现增删改查CRUD实例源码


CRUD是什么？

CRUD是指在做计算处理时的增加(Create)、读取(Retrieve)、更新(Update)和删除(Delete)几个单词的首字母简写。CRUD主要被用在描述软件系统中数据库或者持久层的基本操作功能。


CSFramework.WebApi后端开发框架测试程序主界面:

点【基础资料（Customer,Object Entity）】按钮打开【客户资料管理】管理界面。


贴图图片-Winform调用WebApi接口实现增删改查CRUD实例源码


一、实现新增功能（Create)


贴图图片-Winform调用WebApi接口实现增删改查CRUD实例源码1


新增按钮事件：

C# Code:

//新增客户
 private void btnAdd_Click(object sender, EventArgs e)
{
  _Mode = "Add";
  
  //创建客户实体对象
   _Current = new Entity_Customer();
  _Current.CreatedBy = "admin";
  _Current.CreationDate = DateTime.Now;
  
  //绑定主表文本框数据源
   DoBindingEditorPanel(panel3, _Current);
  
  //设置按钮状态
   SetButtonState();
  
  tabControl1.SelectedTab = tabPage2;
  txtCustomerCode.ReadOnly = false;
}

//来源:C/S框架网(www.csframework.com) QQ:23404761


新建一条记录，首先要创建实体对象，然后绑定编辑界面文本框架的数据源（显示数据）。


动态绑定资料编辑组件文本框的数据源：

C# Code:

/// <summary>
/// 动态绑定资料编辑组件的数据源
/// </summary>
/// <param name="editorPanel"></param>
/// <param name="dataSource"></param>
 private void DoBindingEditorPanel(Control editorPanel, object dataSource)
{
  string fieldName = "";
  
  for (int i = 0; i <= editorPanel.Controls.Count - 1; i++)
  {
    //匹配：txt字段名（属性名）的组件，如：txtCustomerCode, txtCustomerName
     if (editorPanel.Controls[i].Name.Substring(0, 3) != "txt") continue;
    
    if (editorPanel.Controls[i] is TextBoxBase)
    {
      TextBoxBase edit = editorPanel.Controls[i] as TextBoxBase;
      
      fieldName = edit.Name.Substring(3, edit.Name.Length - 3);
      edit.DataBindings.Clear();
      Binding b = new Binding("Text", dataSource, fieldName);
      edit.DataBindings.Add(b);//绑定数据源
       b.ReadValue();
    }
  }
}



保存按钮事件：

C# Code:

//保存事件
 private void btnSave_Click(object sender, EventArgs e)
{
  //调用业务层保存方法
   ModelResponse result = new bllCustomer().Post(_Current, _Mode);
  
  if (result.Code == 0)
  {
    //刷新缓存
     if (dataGridView1.DataSource == null)
    {
      List<Entity_Customer> list = new List<Entity_Customer>();
      list.Add(_Current);
      dataGridView1.DataSource = list;
    }
    else
    {
      if (_Mode == "Add")
      {
        List<Entity_Customer> list = dataGridView1.DataSource as List<Entity_Customer>;
        list.Add(_Current);
        dataGridView1.DataSource = null;
        dataGridView1.DataSource = list;
        
        dataGridView1.Rows[dataGridView1.Rows.Count - 1].Selected = true;
        dataGridView1.CurrentCell = dataGridView1[0, dataGridView1.Rows.Count - 1];
      }
      if (_Mode == "Edit")
      {
        Entity_Customer customer = dataGridView1.SelectedCells[0].OwningRow.DataBoundItem as Entity_Customer;
        CSFramework.WebApi.Core.WebApiDataConverter.CopyObject(_Current, customer);
      }
    }
    
    _Mode = "View";
    SetButtonState();
    MessageBox.Show("保存成功！");
  }
  else
  {
    MessageBox.Show("保存失败！\r\n" + result.Message);
  }
}

//来源:C/S框架网(www.csframework.com) QQ:23404761



提交资料，调用WebApi接口：


C# Code:


/// <summary>
/// 保存数据
/// </summary>
/// <param name="model"></param>
/// <param name="mode"></param>
/// <returns></returns>
 internal ModelResponse Post(Entity_Customer model, string mode)
{
  string data = JsonConvert.SerializeObject(model);
  ModelRequestAction request = ModelExample.GetRequestAction("admin", "", "WebApi_TestDB", 800001, mode, data, false);
  
  string result = WebApiTools.Post(_URL, JsonConvert.SerializeObject(request, JsonSettings.Current), HttpContentType.Application_JSON);
  ModelResponse response = JsonConvert.DeserializeObject<ModelResponse>(result);
  return response;
}

//来源:C/S框架网(www.csframework.com) QQ:23404761




二、实现删除功能（Delete)


首先在表格中选择一条记录，点【删除】按钮。

C# Code:

//删除按钮事件
 private void btnDelete_Click(object sender, EventArgs e)
{
  if (dataGridView1.RowCount <= 0) return;
  
  Entity_Customer customer = dataGridView1.SelectedCells[0].OwningRow.DataBoundItem as Entity_Customer;
  
  //调用接口删除记录
   bool ok = new bllCustomer().Delete(customer.CustomerCode);
  
  if (ok)
  {
    List<Entity_Customer> data = (dataGridView1.DataSource as List<Entity_Customer>);
    data.Remove(customer);
    dataGridView1.DataSource = null;
    dataGridView1.DataSource = data;
    
    //显示下一条记录
     if (tabControl1.SelectedIndex == 1 && dataGridView1.Rows.Count > 0)
    btnView_Click(btnView, new EventArgs());
    
    MessageBox.Show("删除成功");
  }
}

//来源:C/S框架网(www.csframework.com) QQ:23404761




C# Code:

/// <summary>
/// 删除数据,调用WebApi接口
/// </summary>
/// <param name="PONO"></param>
/// <returns></returns>
 internal bool Delete(string customerCode)
{
  ModelRequestAction request = ModelExample.GetRequestAction("admin", "", "WebApi_TestDB", 800001, "Delete", PONO, false);
  string result = WebApiTools.Post(_URL, JsonConvert.SerializeObject(request, JsonSettings.Current), HttpContentType.Application_JSON);
  ModelResponse response = JsonConvert.DeserializeObject<ModelResponse>(result);
  return response.Code == 0;
}

//来源:C/S框架网(www.csframework.com) QQ:23404761




三、实现修改功能（Update)


修改一条记录，首先要获取当前记录的数据并转换为实体对象，然后在界面显示数据（绑定对象的数据源）。


C# Code:

//查看详情按钮事件
 private void btnView_Click(object sender, EventArgs e)
{
  if (dataGridView1.RowCount <= 0) return;
  
  _Mode = "View";
  
  Entity_Customer customer = dataGridView1.SelectedCells[0].OwningRow.DataBoundItem as Entity_Customer;
  
  _Current = new bllCustomer().GetDataByKey(customer.CustomerCode);
  
  //绑定主表文本框数据源
   DoBindingEditorPanel(panel3, _Current);
  
  SetButtonState();
  tabControl1.SelectedTab = tabPage2;
}

//来源:C/S框架网(www.csframework.com) QQ:23404761



根据主键获取客户资料：


C# Code:

/// <summary>
/// 获取客户资料
/// </summary>
/// <param name="customerCode"></param>
/// <returns></returns>
 public Entity_Customer GetDataByKey(string customerCode)
{
  ModelRequestAction request = ModelExample.GetRequestAction("admin", "", "WebApi_TestDB", 800001, "View", customerCode, false);
  
  string result = WebApiTools.Post(_URL, JsonConvert.SerializeObject(request, JsonSettings.Current), HttpContentType.Application_JSON);
  ModelResponse response = JsonConvert.DeserializeObject<ModelResponse>(result);
  if (response.Code == 0)
  return JsonConvert.DeserializeObject<Entity_Customer>(response.Data);
  else
  return null;
}

//来源:C/S框架网(www.csframework.com) QQ:23404761





四、实现查询功能 (Retrieve)


查询按钮事件：


C# Code:

//查询客户资料
private void btnQuery_Click(object sender, EventArgs e)
{
  //查询参数 
   dynamic queryParam = new
  {
    CustomerCode = txt_CustomerCode.Text,
    NativeName = txt_NativeName.Text
    };
    
    dataGridView1.AutoGenerateColumns = false;
    dataGridView1.DataSource = new bllCustomer().Query(queryParam);
    
    if (dataGridView1.DataSource == null) MessageBox.Show("查询资料失败！");
  }
  
  //来源:C/S框架网(www.csframework.com) QQ:23404761



BLL.Query方法：


C# Code:

/// <summary>
/// 查询客户资料
/// </summary>
/// <param name="paramObject">查询参数，动态对象模型</param>
/// <returns></returns>
public List<Entity_Customer> Query(dynamic paramObject)
{
  string dataJson = JsonConvert.SerializeObject(paramObject, JsonSettings.Current);
  
  //创建WebApi接口请求对象
   ModelRequestAction request = ModelExample.GetRequestAction("admin", "", "WebApi_TestDB", 800001, "Query", dataJson, false);
  
  //提交,POST
   string result = WebApiTools.Post(_URL, JsonConvert.SerializeObject(request, JsonSettings.Current), HttpContentType.Application_JSON);
  ModelResponse response = JsonConvert.DeserializeObject<ModelResponse>(result);
  if (response.Code == 0)
  return JsonConvert.DeserializeObject<List<Entity_Customer>>(response.Data);
  else
  return null;
}





创建WebApi接口请求对象:


C# Code:

/// <summary>
/// 创建WebApi接口请求对象
/// </summary>
/// <param name="userID">用户账号,对应用户表的Account字段</param>
/// <param name="token">令牌，登录成功后自动分配</param>
/// <param name="actionID">接口编号、功能编号</param>
/// <param name="op">具体操作，如:Add/Delete/Edit/Query</param>
/// <param name="data">本次操作数据，如Op=Query,Data可以是查询条件</param>
/// <param name="dataEncrypt">数据是否加密</param>
/// <returns></returns>
public static ModelRequestAction GetRequestAction(string userID, string token, string dbid, intactionID, string op, string data, bool dataEncrypt = true)
{
  //Request.Data数据对象
   ModelRequestClientData M = new ModelRequestClientData();
  M.UserID = userID;
  M.Token = token;
  M.DBID = dbid;
  
  string clientData = JsonConvert.SerializeObject(M, JsonSettings.Current);
  
  //Request请求主体对象
   ModelRequestAction mr = new ModelRequestAction();
  mr.Timestamp = DateTime.Now.ToString("yyyyMMddHHmmssfff");
  mr.Operation = op;
  mr.Action = actionID;
  mr.ApiKey = PrivateData.apikey;//公钥
   mr.Data = dataEncrypt ? CryptoHelper.DESEncrypt(data, PrivateData.DES_Key, PrivateData.DES_iv) : data;
  mr.Sign = CryptoHelper.ToMD5(mr.ApiKey + mr.Data + PrivateData.secret + mr.Timestamp);//Sign数字签名
   mr.DataIsEncrypted = dataEncrypt;
  mr.ClientData = clientData;
  
  return mr;
}




WebApi服务端实现：

实现命令层，Cmd_Test_Customer：

贴图图片-Winform调用WebApi接口实现增删改查CRUD实例源码2


Cmd_Test_Customer.Execute执行方法：

C# Code:

/// <summary>
/// 执行命令
/// </summary>
/// <returns></returns>
 public override IUserResponse Execute()
{
  //新增
   if (_UserRequest.Operation == CommandOperation.Add.ToString())
  {
    Entity_Customer customer = _UserRequest.GetDataObject<Entity_Customer>();
    
    DataTable dtTmp = _DAL.GetDataByKey("-");
    WebApiDataConverter.AddObject2Table(customer, dtTmp);
    
    bool ok = _DAL.Update(dtTmp);
    return new ModelResponse { Code = ok ? 0 : -1, Message = "操作" + (ok ? "成功" : "失败") };
  }
  
  //删除
   if (_UserRequest.Operation == CommandOperation.Delete.ToString())
  {
    bool ok = _DAL.Delete(_UserRequest.Data);
    return new ModelResponse { Code = ok ? 0 : -1, Message = "操作" + (ok ? "成功" : "失败") };
  }
  
  //修改
   if (_UserRequest.Operation == CommandOperation.Edit.ToString())
  {
    Entity_Customer customer = _UserRequest.GetDataObject<Entity_Customer>();
    
    DataTable dtTmp = _DAL.GetDataByKey("-");
    WebApiDataConverter.AddObject2Table(customer, dtTmp);
    dtTmp.AcceptChanges();
    dtTmp.Rows[0].SetModified();
    
    bool ok = _DAL.Update(dtTmp);
    return new ModelResponse { Code = ok ? 0 : -1, Message = "操作" + (ok ? "成功" : "失败") };
  }
  
  //查询
   if (_UserRequest.Operation == CommandOperation.Query.ToString())
  {
    dynamic data = JsonConvert.DeserializeObject<dynamic>(_UserRequest.Data);//测试动态对象
     List<Entity_Customer> list = _DAL.Query(data);
    
    return new ModelResponse
    {
      Code = 0,
      Message = "操作成功",
      Data = JsonConvert.SerializeObject(list)
      };
    }
    
    //查询-根据主键查询一条记录
     if (_UserRequest.Operation == "GetCustomer")
    {
      List<Entity_Customer> list = _DAL.QueryByKey(_UserRequest.Data);
      
      return new ModelResponse
      {
        Code = 0,
        Message = "操作成功",
        Data = list.Count > 0 ? JsonConvert.SerializeObject(list) : ""
        };
      }
      
      //根据主键值获取详情
       if (EqualsOP(_UserRequest.Operation, CommandOperation.View))//GetDataByKey
       {
      Entity_Customer customer = _DAL.Get(_UserRequest.Data);
      return new ModelResponse
      {
        Code = 0,
        Message = "操作成功",
        Data = JsonConvert.SerializeObject(customer)
        };
      }
      
      return new ModelResponse
      {
        Code = ErrorCodes.InterfaceIdInvalide,
        Message = ErrorCodes.InterfaceIdInvalide_Msg
        };
      }
      
      //来源:C/S框架网(www.csframework.com) QQ:23404761



数据访问层：

C# Code:

/// <summary>
/// 客户管理，数据层
/// </summary>
 public class dalCustomer : dalBaseDataDict
{
  public dalCustomer(IUserRequestClientLogin loginer)
  {
    if (loginer != null)
    _Database = DatabaseProvider.GetDatabase(loginer.DBID);
    else
    _Database = DatabaseProvider.GetDatabase("WebApi_TestDB");
    
    this.ORM = typeof(Entity_Customer);
  }
  
  public override DataTable GetSummaryData()
  {
    string sql = "SELECT * FROM tb_Customer ORDER BY CreationDate DESC";
    return _Database.GetTable(sql, _TableName);
  }
  
  protected override IGenerateSqlCommand CreateSqlGenerator(string tableName)
  {
    Type ORM = null;
    
    if (tableName == Entity_Customer.__TableName) ORM = typeof(Entity_Customer);
    
    if (ORM == null) throw new Exception(tableName + "表没有ORM模型！");
    
    return new GenerateSqlCmdByObjectClass(_Database, ORM);
  }
  
  public List<Entity_Customer> Query(dynamic data)
  {
    string sql = "SELECT * FROM dbo.tb_Customer WHERE 1=1";
    if (data.CustomerCode.ToString() != "") sql += " AND CustomerCode LIKE '%" + data.CustomerCode + "%'";
    if (data.NativeName.ToString() != "") sql += " AND NativeName LIKE '%" + data.NativeName + "%'";
    
    List<Entity_Customer> list = _Database.ExecuteReader<Entity_Customer>(sql, row => WebApiDataConverter.Convert2Object<Entity_Customer>(row));
    return list;
  }
  
  public List<Entity_Customer> QueryByKey(string key)
  {
    string sql = "SELECT * FROM dbo.tb_Customer WHERE CustomerCode ='" + key + "'";
    
    List<Entity_Customer> list = _Database.ExecuteReader<Entity_Customer>(sql, row => WebApiDataConverter.Convert2Object<Entity_Customer>(row));
    return list;
  }
  
  public Entity_Customer Get(string customerCode)
  {
    string sql = "SELECT * FROM dbo.tb_Customer WHERE CustomerCode='" + customerCode + "'";
    Entity_Customer customer = _Database.ExecuteReader<Entity_Customer>(sql);
    return customer;
  }
}

//来源:C/S框架网(www.csframework.com) QQ:23404761



CSFramework.WebApi后端开发框架测试程序，VS2017解决方案完整版：


贴图图片-Winform调用WebApi接口实现增删改查CRUD实例源码3


<本文完>



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参考文档：

表单上实现增删改查，除了生成的BLL,DAL和ORM表，还需要处理什么？
DevExpress XtraReport报表实例源码下载(C#)
C# 数据窗体实现增删改查(CRUD)源码下载(原)
平台建立WCF服务操作指引、三层源码+桥接接口实现
C#.NET WEBAPI 接口设计与调用
C#.NET WEBAPI 接口设计-调用多个参数的接口
C/S客户端Winform窗体调用WebApi接口(C# 实例)
客户端使用HTTPGET请求调用WebApi指定FromUri参数对象模型的接口
CSFramework.WebApi时钟定时作业异步处理程序(IThreadHandler接口)实现
CSFramework.WebApi后端服务器框架：客户端调用WebApi接口方式（签名+Token令牌)
基于Web前端用户调用CSFramework.WebApi服务端登录登出接口实现
CSFramework.WebApi开发框架模拟Web用户端登录、调用WebApi接口增删改查数据
调用WebApi接口POST操作失败Unable to connect to the remote server
WebApi开发框架：使用HttpGet方式调用WebAPI接口
Web端使用VUE调用WebApi接口实现用户登录及采用Token方式数据交互
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