檢索數據

Question

我在數據庫中作爲3個表：

1. 的Emp（姓名，cellnumber，付款，Joining_date）
2. Addmoney（姓名，date_of money_taken，類型）
3. ADDDATE（姓名，Leaving_Date）

我希望只顯示這些從這些3表中的列（名稱，付款，Date_of_money_Taken，Joining_date，Leaving_date）所示，當用戶輸入存儲在EMP表在TextBox任何名稱，我在下面的代碼中遇到問題。這是引發此：

Exception({"The multi-part identifier \"name.Text\" could not be bound."})

private void ShowEmp_Load(object sender, EventArgs e) 
{ 
    // create the connection string 
    connectionString = GetConnectionString(); 
    connection = new SqlConnection(connectionString); 
    queryString = "select Emp.name,Emp.Payment,Emp.JoiningDate,Addm.Date,AddDate.LeavingDate from Emp,Addm,AddDate where name.Text='" + name + " ' ";// Select * From Emp 

    // create an SqlDataAdapter to execute the query 
    dAdapter = new SqlDataAdapter(queryString, connection); 

    // create a command builder 
    cBuilder = new SqlCommandBuilder(dAdapter); 

    // create a datatable to hold query results 
    dTable = new DataTable(); 

    // fill DataTable 
    dAdapter.Fill(dTable);<-EXCEPTION({"The multi-part identifier \"name.Text\" could not be bound."}) 

    // the DataGridView 
    //DataGridView dataGridView1 = new DataGridView(); 

    // BindingSource to sync DataTable and DataGridView 
    bSource = new BindingSource(); 

    // set the BindingSource DataSource 
    bSource.DataSource = dTable; 

    // set the DataGridView DataSource 
    dataGridView1.DataSource = bSource; 

} 

Answer 1

是不是你的錯查詢？嘗試此查詢：

queryString = " 
    select 
     Emp.name, Emp.Payment, Emp.JoiningDate, Addm.Date, AddDate.LeavingDate 
    from 
     Emp, Addm, AddDate where Emp.name = '" + name + "' "; 

你引用name.Text當它看起來像字段的名稱應該是Emp.name。

請注意，你REALLY需要使用params來做到這一點。這是開放的SQL注入...