將數據添加到使用MVC的數據庫4

Question

正試圖使用​​表單向數據庫添加一些數據。

我已經有了很少的數據，並設法得到編輯工作，但增加了有問題的技巧。

這是我的編輯代碼在數據庫中的數據進行編輯：

[HttpPost] 
    public ActionResult Save(M2Portal.Areas.Admin.Models.Users.Roles roleForm) 
     { 
      try 
     { 
      if (ModelState.IsValid) 
      { 
       if (Mode == "Add") 
       { 

        ****This is where my add code goes******* 
       } 
       else 
       { 
        var role = Srvctx.Roles.FirstOrDefault(w => w.RoleID == roleForm.RoleId); 
        role.RoleName = roleForm.RoleName; 
        role.RoleDescription = roleForm.RoleDescription; 
        Srvctx.SubmitChanges(); 
       } 

       return RedirectToAction("RoleManagement"); 
      } 

      return RedirectToAction("RoleManagement"); 
     } 
     catch (Exception e) 
     { 
      return RedirectToAction("RoleManagement"); 
     } 

}

這是模型代碼：

這是爲補充。

public Roles() 
    { 
     Mode = "Add"; 
     RoleId = 0; 
     RoleDescription = ""; 
     RoleName = ""; 
     CustomerBlacklist = new List<vw_RoleCustomerBlacklist>(); 
    } 

這是用於編輯：哪些工作。

public Roles(int roleId) 
    { 
     Mode = "Edit"; 
     //RoleId = roleId; 
     RoleId = roleId; 
     RoleName = _m2Sctx.Roles.Where(s => s.RoleID == RoleId).Select(c => c.RoleName).FirstOrDefault(); 
     RoleDescription = _m2Sctx.Roles.Where(s => s.RoleID == RoleId).Select(c => c.RoleDescription).FirstOrDefault(); 
     CustomerBlacklist = _m2Sctx.vw_RoleCustomerBlacklists.Where(s => s.RoleId == roleId).ToList(); 
     CustName = CustName; 


    } 

所以現在我正在使用添加功能，這是有問題。

到表單中添加新數據...任何想法：

if (Mode == "Add") 
       { 

        ****This is where my add code goes******* 
       } 

你可以看到我的編輯是如何設置的，但對於添加其完全不同的，有我在哪裏罰款難...

Answer 1

嘗試婁代碼：

if (ModelState.IsValid) 
     { 
      if (roleForm.RoleId == 0) 
      { 

       var role = new Role() 
       { 
        RoleName = roleForm.RoleName, 
        RoleDescription = roleForm.RoleDescription 
       }; 



Srvctx.Roles.InsertOnSubmit(role); 
      Srvctx.SubmitChanges(); 
      } 
      else 
      { 
       var role = Srvctx.Roles.FirstOrDefault(w => w.RoleID == roleForm.RoleId); 
       role.RoleName = roleForm.RoleName; 
       role.RoleDescription = roleForm.RoleDescription; 
       Srvctx.SubmitChanges(); 
      } 

      return RedirectToAction("RoleManagement"); 
     } 

Answer 2

var newRole = new Role { 
    RoleName = roleForm.RoleName, 
    RoleDescription = roleForm.RoleDescription 
}; 

Srvctx.Roles.InsertOnSubmit(newRole); 

假設您的「角色」實體類被稱爲Role。此外，如果您的「角色」類中包含CustomerBlacklist，也可以填充CustomerBlacklist。

Answer 3

爲編輯模式，而不是

public Roles(int roleId) 
    { 
     Mode = "Edit"; 
     //RoleId = roleId; 
     RoleId = roleId; 
     RoleName = _m2Sctx.Roles.Where(s => s.RoleID == RoleId).Select(c => c.RoleName).FirstOrDefault(); 
     RoleDescription = _m2Sctx.Roles.Where(s => s.RoleID == RoleId).Select(c => c.RoleDescription).FirstOrDefault(); 
     CustomerBlacklist = _m2Sctx.vw_RoleCustomerBlacklists.Where(s => s.RoleId == roleId).ToList(); 
     CustName = CustName; 


    } 

創建一個方法，返回基於角色ID角色的單個對象：

public M2Portal.Areas.Admin.Models.Users.Roles Roles(int roleId) 
     { 
      var roleDBEntity = _m2Sctx.Roles.FirstOrDefault(s => s.RoleID == RoleId); 

    var roleModelEntity = new M2Portal.Areas.Admin.Models.Users.Roles(){ 
     RoleId = roleDBEntity.RoleId, 
     RoleName = roleDBEntity.RoleName, 
     RoleDescription = roleDBEntity.RoleDescriptio 
     CustomerBlacklist = roleDBENtity.CustomerBlacklist // Assuming there's relation between Role and CustomerBlackList table 
}; 
    return roleModelEntity; 
     }