C＃/ SQL表没有显示新条目

时间：2014-03-30 16:53:17

标签： c# sql winforms visual-studio

我有一个comboBox，可以很好地插入新数据。但是当我选择某些现有数据时不会更新。我试着写一个疯狂的insertUpdate方法，但没有运气。任何帮助将不胜感激。这是我的C＃：

if (updateDataButton.Checked == true)
                    {
                        using (System.Data.SqlClient.SqlConnection objCon2 =
                        new System.Data.SqlClient.SqlConnection("Data Source=.; Initial Catalog=EmployeeProjects; Integrated Security=TRUE"))
                        {

                            using (System.Data.SqlClient.SqlCommand objCmd2 =
                                new System.Data.SqlClient.SqlCommand("pUpdEmployeeProjectHours", objCon2))
                            {
                                objCmd2.CommandType = CommandType.StoredProcedure;
                                objCmd2.Parameters.AddWithValue("@EmployeeName", EmployeeNameBox.Text);

                                insertUpdates();

                                objCmd2.Parameters.AddWithValue("@ProjectName", ProjectNameBox.Text);
                                objCmd2.Parameters.AddWithValue("@Date", DateTime.Parse(DateTimeBox.Text));
                                objCmd2.Parameters.AddWithValue("@Hours", HoursBox.Text);

                                try
                                {

                                    objCon2.Open();

                                    objCmd2.ExecuteNonQuery();
                                    System.Data.SqlClient.SqlDataAdapter da2
                   = new System.Data.SqlClient.SqlDataAdapter("Select * From EmployeeProjectHours", objCon2);



                                }
                                catch
                                {
                                    throw;
                                }
                                finally
                                {

                                    objCon2.Close();

                                }
                            }
                        }
                    }

                }
    private void insertUpdates()
    {//.ToString()
        if (EmployeeNameBox.SelectedText == "Bob Smith")
        {
            using (System.Data.SqlClient.SqlConnection objCon =
               new System.Data.SqlClient.SqlConnection("Data Source=.; Initial Catalog=EmployeeProjects; Integrated Security=TRUE"))
            {

                using (System.Data.SqlClient.SqlCommand objCmd =
                    new System.Data.SqlClient.SqlCommand("pUpdEmployeeNames", objCon))
                {

                    objCmd.CommandType = CommandType.StoredProcedure;

                    objCmd.Parameters.AddWithValue("@EmployeeId", 1);
                    objCmd.Parameters.AddWithValue("@EmployeeName", EmployeeNameBox.Text);



                    try
                    {
                        objCon.Open();
                        objCmd.ExecuteNonQuery();
                        System.Data.SqlClient.SqlDataAdapter da4
                = new System.Data.SqlClient.SqlDataAdapter("Select * From EmployeeProjectHours", objCon);



                    }
                    catch
                    {
                        throw;
                    }
                    finally
                    {

                        objCon.Close();
                    }
                }
            }
        }


        else
            if (EmployeeNameBox.SelectedText == "Sue Jones")
            {
                {
                    using (System.Data.SqlClient.SqlConnection objCon2 =
                      new System.Data.SqlClient.SqlConnection("Data Source=.; Initial Catalog=EmployeeProjects; Integrated Security=TRUE"))
                    {

                        using (System.Data.SqlClient.SqlCommand objCmd2 =
                            new System.Data.SqlClient.SqlCommand("pUpdEmployeeNames", objCon2))
                        {

                            objCmd2.CommandType = CommandType.StoredProcedure;


                                objCmd2.Parameters.AddWithValue("@EmployeeId", 2);
                                objCmd2.Parameters.AddWithValue("@EmployeeName", EmployeeNameBox.Text);



                            try
                            {
                                objCon2.Open();
                                objCmd2.ExecuteNonQuery();
                                System.Data.SqlClient.SqlDataAdapter da5
                        = new System.Data.SqlClient.SqlDataAdapter("Select * From EmployeeProjectHours", objCon2);



                            }
                            catch
                            {
                                throw;
                            }
                            finally
                            {

                                objCon2.Close();
                            }
                        }
                    }
                }
            }
    }

这是查询; 

Set NoCount On -- Turns off the annoying "One Row affected" messages 
-- Note: Do not place the Set NoCount On option inside a Stored Procedure, since it 
-- will send a false error to an ADO.NET DataAdpater object.

-- 1) Make the databse
USE [master]
GO
If Exists(Select Name from master.Sys.databases where name = 'EmployeeProjects')
 Begin 
  ALTER DATABASE [EmployeeProjects] SET SINGLE_USER WITH ROLLBACK IMMEDIATE 
    Drop Database[EmployeeProjects]
 End 
GO

CREATE DATABASE [EmployeeProjects]
GO

USE [EmployeeProjects]
GO

-- 2) Make the tables
CREATE TABLE [dbo].[Employees]
(
    [EmployeeId] [int] NOT NULL PRIMARY KEY ,
    [EmployeeName] [varchar](100) NOT NULL,
)
GO

CREATE TABLE [dbo].[Projects]
(
    [ProjectId] [int] NOT NULL PRIMARY KEY,
    [ProjectName] [varchar](100) NOT NULL,
    [ProjectDescription] [varchar](5000) NOT NULL,
)
GO

CREATE TABLE [dbo].[EmployeeProjectHours]
(
    [EmployeeId] [int] NOT NULL,
    [ProjectId] [int] NOT NULL,
    [Date] [datetime] NOT NULL,
    [Hours] [decimal](18, 2) NOT NULL,
    CONSTRAINT [PK_EmployeeProjectHours] PRIMARY KEY CLUSTERED 
        ([EmployeeId] ASC,[ProjectId] ASC,[Date] ASC)
)
GO

CREATE TABLE [dbo].[ThisYearsDates]
(
    [DateId] [int] Identity NOT NULL PRIMARY KEY,
    [DateName] [varchar](100) NOT NULL,
)
GO

CREATE TABLE [dbo].[ValidHourEntries]
(
    [TimePeriodId] [int] Identity NOT NULL PRIMARY KEY,
    [TimePeriod] [varchar](100) NOT NULL,
)
GO

-- 3) Fill the tables with test data
-- Add two test employees
Insert into [dbo].[Employees] Values (1, 'Bob Smith')
Insert into [dbo].[Employees] Values (2, 'Sue Jones')
GO
-- Add two test Projects
Insert into [dbo].[Projects] Values (100, 'Accounting DB Upgrade', 'Upgrade the Accounting Database to our new SQL 2008 Server')
Insert into [dbo].[Projects] Values (101, 'Accounting Application Upgrade', 'Modify our existing Accounting Application to connect to the new upgraded server')
GO
-- Add four test Employee Project Hours
Insert into [dbo].[EmployeeProjectHours] Values (1,100,'1/1/' + Cast(Year(Getdate()) as varchar(4)), 6)
Insert into [dbo].[EmployeeProjectHours] Values (1,100,'1/2/' + Cast(Year(Getdate()) as varchar(4)), 4)
Insert into [dbo].[EmployeeProjectHours] Values (2,101,'1/1/' + Cast(Year(Getdate()) as varchar(4)), 5.5)
Insert into [dbo].[EmployeeProjectHours] Values (2,101,'1/2/' + Cast(Year(Getdate()) as varchar(4)), 6)
GO

-- Add This years dates
Declare @DateId int = 1
Declare @Date datetime = '1/1/' + Cast(Year(GetDate()) as Varchar(4));
While (Year(@Date) < (Year(GetDate()) + 1))
    Begin
        Insert into [dbo].[ThisYearsDates]Values(Convert(varchar(50), @Date, 101) )
        Set @DateId = @DateId + 1
        Set @Date = DateAdd(dd, 1, @Date)
    End
GO

-- Add Valid Hourly Entries
Declare @TimePeriod decimal(18,2) = 0
While ( @TimePeriod <= 24)
    Begin 
        Insert into [ValidHourEntries]( TimePeriod) Values (@TimePeriod)
        Set @TimePeriod = @TimePeriod + .25 
    End
Go

-- 4) Review everything you have so far
Select * From [dbo].[Employees]
Select * From [dbo].[Projects]
Select * From [dbo].[EmployeeProjectHours]
Select * From [dbo].[ThisYearsDates]
Select * From [dbo].[ValidHourEntries]
GO


-- 5) Create Select Sprocs for Tables
Create Proc pSelEmployeeNames
  AS
  Begin
    Declare @RC int = 0
    Begin Try
        Select 
            EmployeeName 
        From [dbo].[Employees]
        Set @RC = 100 -- Indicates Success  
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO

Create Proc pSelProjectNames
  AS
  Begin
    Declare @RC int = 0
    Begin Try
        Select 
            ProjectName 
        From [dbo].[Projects]
        Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO

Create Proc pSelEmployeeProjectHours
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
        SELECT 
            dbo.EmployeeProjectHours.Date, 
            dbo.Employees.EmployeeName, 
            dbo.Projects.ProjectName, 
            dbo.EmployeeProjectHours.Hours
        FROM  dbo.EmployeeProjectHours 
        INNER JOIN dbo.Employees 
            ON dbo.EmployeeProjectHours.EmployeeId = dbo.Employees.EmployeeId 
        INNER JOIN dbo.Projects 
            ON dbo.EmployeeProjectHours.ProjectId = dbo.Projects.ProjectId
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End       
GO

Create Proc pSelThisYearsDates
  AS
  Begin
    Declare @RC int = 0
    Begin Try
      SELECT 
       [DateId]
      ,[DateName] 
      FROM [ThisYearsDates]
        Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO


Create Proc pSelValidHours
  AS
  Begin
    Declare @RC int = 0
    Begin Try
        Select
        TimePeriodId,
        TimePeriod
        From ValidHourEntries
        Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO


    -- 5a) Review everything you have so far
Exec pSelEmployeeNames
Exec pSelProjectNames
Exec pSelEmployeeProjectHours
Exec pSelThisYearsDates
Exec pSelValidHours
GO


-- 6) Insert Sprocs
Create Proc pInsEmployeeNames
( @EmployeeId int, @EmployeeName varchar(100))
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
      Begin Transaction  
        Insert into [dbo].[Employees] Values (@EmployeeId,@EmployeeName)
      Commit Transaction
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
        Rollback Transaction            
    End Catch   
    Return @RC
  End   
GO

Create Proc pInsProjectNames
( @ProjectId int, @ProjectName varchar(100), @ProjectDescription varchar(5000))
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
      Begin Transaction    
        Insert into [dbo].[Projects] Values (@ProjectId, @ProjectName, @ProjectDescription)
      Commit Transaction
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
        Rollback Transaction            
    End Catch   
    Return @RC
  End   
GO

Create Proc pInsEmployeeProjectHours
( @EmployeeName varchar(100), @ProjectName varchar(100), @Date datetime, @Hours decimal(18,2))
  AS
  Begin
    Declare @RC int = 0, @EmployeeId Int = 0, @ProjectId int = 0    
    Begin Try  
        -- Look up the IDs

        Select @EmployeeId = EmployeeId From dbo.Employees Where EmployeeName = @EmployeeName
        Select @ProjectId = ProjectId From dbo.Projects Where ProjectName = @ProjectName    
      Begin Transaction         
        Insert into [dbo].[EmployeeProjectHours] Values(@EmployeeId, @ProjectId, @Date, @Hours) 
      Commit Transaction        
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
        Rollback Transaction        
    End Catch   
    Return @RC
  End   
GO

    -- 6a) Review everything you have so far
Exec pInsEmployeeNames @EmployeeId = 3 , @EmployeeName = 'Test User' 
Exec pInsProjectNames @ProjectId = 103, @ProjectName = 'Test Project' , @ProjectDescription = 'Test Desc'
Exec pInsEmployeeProjectHours @EmployeeName = 'Test User', @ProjectName = 'Test Project', @Date = '1/1/2011', @Hours = 1
GO

Exec pSelEmployeeNames
Exec pSelProjectNames
Exec pSelEmployeeProjectHours
GO


-- 7) Update Sprocs
Create Proc pUpdEmployeeNames
( @EmployeeId int, @EmployeeName varchar(100))
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
      Begin Transaction  
        Update [dbo].[Employees] 
        Set 
            [EmployeeId] = @EmployeeId, 
            [EmployeeName] = @EmployeeName
        Where 
            [EmployeeId] = @EmployeeId 
            OR 
            [EmployeeName] = @EmployeeName
      Commit Transaction
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
        Rollback Transaction
    End Catch   
    Return @RC
  End   
GO

Create Proc pUpdProjectNames
( @ProjectId int, @ProjectName varchar(100),  @ProjectDescription varchar(5000))
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
      Begin Transaction    
        Update [dbo].[Projects]
        Set 
            [ProjectId] = @ProjectId, 
            [ProjectName] = @ProjectName,
            [ProjectDescription] = @ProjectDescription          
        Where 
            [ProjectId] = @ProjectId 
            OR 
            [ProjectName] = @ProjectName
            OR    
            [ProjectDescription] = @ProjectDescription        
      Commit Transaction
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
        Rollback Transaction        
    End Catch   
    Return @RC
  End   
GO

Create Proc pUpdEmployeeProjectHours
( @EmployeeName varchar(100), @ProjectName varchar(100), @Date datetime, @Hours decimal(18,2))
  AS
  Begin
    Declare @RC int = 0, @EmployeeId Int = 0, @ProjectId int = 0   
    Begin Try  
        -- Look up the IDs
        Select @EmployeeId = EmployeeId From dbo.Employees Where EmployeeName = @EmployeeName
        Select @ProjectId = ProjectId From dbo.Projects Where ProjectName = @ProjectName    

      Begin Transaction   
        Update [dbo].[EmployeeProjectHours]
        Set 
            [EmployeeId] = @EmployeeId, 
            [ProjectId] = @ProjectId, 
            [Date] = @Date,
            [Hours]= @Hours             
        Where 
            [EmployeeId] = @EmployeeId 
            AND
            [ProjectId] = @ProjectId 
            AND
            [Date] = @Date
      Commit Transaction        
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
        Rollback Transaction            
    End Catch   
    Return @RC
  End   
GO

    -- 7a) Review everything you have so far
    Exec pUpdEmployeeNames @EmployeeId = 3 , @EmployeeName = 'Test User 2' 
    Exec pUpdProjectNames @ProjectId = 103, @ProjectName = 'Test Project 2' , @ProjectDescription = 'Test Desc 2'
    Exec pUpdEmployeeProjectHours @EmployeeName = 'Test User 2',@ProjectName = 'Test Project 2' , @Date = '1/1/2011' , @Hours = 10
    GO

    Exec pSelEmployeeNames
    Exec pSelProjectNames
    Exec pSelEmployeeProjectHours
    GO

-- 8) Delete Sprocs
Create Proc pDelEmployeeNames
( @EmployeeId int = -1, @EmployeeName varchar(100) = '')
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
      Begin Transaction  
        Delete From [dbo].[Employees] 
        Where 
            [EmployeeId] = @EmployeeId 
            OR 
            [EmployeeName] = @EmployeeName
      Commit Transaction
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO

Create Proc pDelProjectNames
( @ProjectId int = -1, @ProjectName varchar(100) = '',  @ProjectDescription varchar(5000) = '')
  AS
  Begin
    Declare @RC int = 0
    Begin Try  
      Begin Transaction    
        Delete From [dbo].[Projects]
        Where 
            [ProjectId] = @ProjectId 
            OR 
            [ProjectName] = @ProjectName
            OR    
            [ProjectDescription] = @ProjectDescription        
      Commit Transaction
    Set @RC = 100 -- Indicates Success          
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO

Create Proc pDelEmployeeProjectHours
( @EmployeeName varchar(100), @ProjectName varchar(100), @Date datetime )
  AS
  Begin
    Declare @RC int = 0, @EmployeeId Int = 0, @ProjectId int = 0 

     -- Look up the IDs
    Select @EmployeeId = EmployeeId From dbo.Employees Where EmployeeName = @EmployeeName
    Select @ProjectId = ProjectId From dbo.Projects Where ProjectName = @ProjectName    

    Begin Try    
      Begin Transaction     
        Delete From [dbo].[EmployeeProjectHours]
        Where 
            [EmployeeId] = @EmployeeId 
            AND
            [ProjectId] = @ProjectId 
            AND
            [Date] = @Date
      Commit Transaction        
    End Try
    Begin Catch
        Set @RC = -100 --Indicates Error
    End Catch   
    Return @RC
  End   
GO

    -- 8a) Review everything you have so far
    Exec pDelEmployeeNames @EmployeeId = 3 , @EmployeeName = 'Test User 2' 
    Exec pDelProjectNames @ProjectId = 103, @ProjectName = 'Test Project 2' , @ProjectDescription = 'Test Desc 2'
    Exec pDelEmployeeProjectHours @EmployeeName = 'Test User 2' , @ProjectName = 'Test Project 2', @Date = '1/1/2011'
    GO

    Exec pSelEmployeeNames
    Exec pSelProjectNames
    Exec pSelEmployeeProjectHours
    GO

1 个答案:

答案 0 :(得分：0)

您需要将EmployeeId字段设置为自动增量。如果您需要返回EmployeeId，请使用SCOPE_IDENTITY。

CREATE TABLE (
  EmployeeId INT IDENTITY PRIMARY KEY,
  ...
);
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