Question

首先，我想指出，我没有运气就找到了解决这个问题的方法。

基本上我在Radform1中有一个Mysql函数，我想从CustomAppointmentEditForm调用

Radform1

  public RadForm1()
    {
        InitializeComponent();

    }

CustomAppointmentEditForm

        public CustomAppointmentEditForm()
    {
        InitializeComponent();

    }

我想从Radform1调用的函数

private void Update_LeadInfo()
    {
        try
        {
            using (MySqlConnection cn = new MySqlConnection(ConString))
            {
                string UniqueID = textBoxDescription.Text;

                string CVR = txtCVR.Text;
                string Firma = txtFirma.Text;
                string Nummer = txtNummer.Text;
                string Addresse = txtAddresse.Text;
                string Postnr = txtPostnr.Text;
                string By = txtBy.Text;
                string Noter = txtNoter.Text;
                string Email = txtEmail.Text;
                string StartDato = dateStart.Text + " " + timeStart.Text;
                string SlutDato = dateEnd.Text + " " + timeEnd.Text;
                string Afholdt = radCheckBox1.CheckState.ToString();
                if(Afholdt == "Checked")
                {
                    Afholdt = "1";
                }
                else
                {
                    Afholdt = "0";
                }
                if(chkAllDay.CheckState == CheckState.Checked)
                {
                    StartDato = dateStart.Text + " " + "00:00";
                    SlutDato = dateEnd.Text + " " + "00:00";
                }
                cn.Open();

                Console.WriteLine(UniqueID);
                MySqlCommand cmd = new MySqlCommand();
                cmd.Connection = cn;
                cmd.CommandText = "UPDATE Leads SET CVR = ('" + CVR + "'), Firma = ('" + Firma + "'), Nummer = ('" + Nummer + "'), Addresse = ('" + Addresse + "'), Postnr = ('" + Postnr + "'), Bynavn = ('" + By + "'), Noter = ('" + Noter + "'), Afholdt = ('" + Afholdt + "'), Email = ('" + Email + "'), Slut_Dato = ('" + SlutDato + "')  WHERE UniqueID = ('" + UniqueID + "');";
                cmd.ExecuteNonQuery();

                cmd.Dispose();
                cn.Close();
            }
        }
        catch (Exception Fejl)
        {
            Console.WriteLine(Fejl);
        }
    }

我知道有一个简单的解决方案，提前谢谢

Answer 1

编辑：我不会在那里使用这种方法。

Update_LeadInfo除RadForm1个对象外，似乎没有使用TextBox.Text中的任何方法。

创建另一个带有参数的类来访问数据库，例如

public static class DatabaseAccess{

    private static string ConString = "<SOMECONSTRING>";
    public static void Update_LeadInfo(LeadInfo infoObj){ //Don't mix CamelCase and _ Case Notation
        using (MySqlConnection cn = new MySqlConnection(ConString))
        {
           MySqlCommand cmd = new MySqlCommand();
           cmd.Connection = cn;
           cmd.CommandText = "UPDATE Leads SET CVR = ('" + infoObj.CVR + "'), Firma = ('" + infoObj.Firma + "'), Nummer = ('" + infoObj.Nummer + "'), Addresse = ('" + infoObjAddresse + "'), Postnr = ('" + infoObj.Postnr + "'), Bynavn = ('" + infoObj.By + "'), Noter = ('" + infoObj.Noter + "'), Afholdt = ('" + infoObj.Afholdt + "'), Email = ('" + infoObj.Email + "'), Slut_Dato = ('" + infoObj.SlutDato + "')  WHERE UniqueID = ('" + infoObj.UniqueID + "');";
           cmd.ExecuteNonQuery();

           cmd.Dispose();
           cn.Close();
        }
    }
}

你LeadInfo上课：

 public class LeadInfo{
     public string CVR {get;set}
     ...
     public string Afholdt {get;set;}
 }

并使用参数化查询！

而不是cmd.CommandText = "UPDATE Leads SET CVR = ('" + infoObj.CVR + "'), Firma = ('" + infoObj.Firma + "'), Nummer = ('" + infoObj.Nummer + "'), Addresse = ('" + infoObjAddresse + "'), Postnr = ('" + infoObj.Postnr + "'), Bynavn = ('" + infoObj.By + "'), Noter = ('" + infoObj.Noter + "'), Afholdt = ('" + infoObj.Afholdt + "'), Email = ('" + infoObj.Email + "'), Slut_Dato = ('" + infoObj.SlutDato + "') WHERE UniqueID = ('" + infoObj.UniqueID + "');";

使用：

string updateCommand = "UPDATE Leads SET CVR = @paramCVR, ..., WHERE UniqueID = @paramUniqueID;"
MySqlCommand m = new MySqlCommand(updateCommand);
m.Parameters.AddWithValue("@paramCVR", infoObj.CVR);
...
m.Parameters.AddWithValue("@paramUniqueID", infoObj.UniqueID);

要访问其他公共非静态方法，您必须在要使用它的类中引用它。

因此，当您现在初始化CustomAppointmentEditForm时，您必须将RadForm1作为参数传递。

如果你想像之前一样调用CustomAppointmentEditForm，那么构建为没有参数的第二个构造函数。

以此为例：

RadForm1 radObj;

public CustomAppointmentEditForm(RadForm1 radObj)
{
    InitializeComponent();
    this.radObj = radObj;
}

private void SomeMethod()
{
    radObj.Update_LeadInfo();
}

这是来自 RadForm1：

CustomAppointmentEditForm custForm = new CustomAppointmentEditForm(this);

Answer 2

首先，Update_LeadInfo()似乎是业务逻辑，你不应该在UI层中拥有业务逻辑。如果将其移动到单独的数据访问项目，则可以重构代码：

<强> DataAccessLayer：

class DataAdapter
{
    public void UpdateLeads(LeadsInfo info)
    {
        using (MySqlConnection cn = new MySqlConnection(ConString))
        {
            cn.Open();

            MySqlCommand cmd = new MySqlCommand();
            cmd.Connection = cn;
            cmd.CommandText = "UPDATE Leads SET CVR = ('" + info.CVR + "'), Firma = ('" + info.Firma + "')," /* ... */;
            cmd.ExecuteNonQuery();    

            cmd.Dispose();
            cn.Close();
        } 
    }
}

UI图层：

class RadForm1
{
    public RadForm1(DataAdapter adapter)
    {
        if (adapter == null)
            throw new ArgumentNullException("adapter");

        InitializeComponent();
        this.Adapter = adapter
    }

    private void Update_LeadInfo()
    {
        this.Adapter.UpdateLeads(new LeadsInfo(
                          CVR: txtCVR.Text,
                          Firma: txtFirma.Text,
                          /* ... */));
    }
}

class CustomAppointmentForm
{
    public CustomAppointmentForm(DataAdapter adapter)
    {
        if (adapter == null)
            throw new ArgumentNullException("adapter");

        InitializeComponent();
        this.Adapter = adapter
    }

    private void Update_LeadInfo()
    {
        this.Adapter.UpdateLeads(new LeadsInfo(
                          CVR: txtCVR.Text,
                          Firma: txtFirma.Text,
                          /* ... */));
    }
}

C＃从另一种形式调用函数（radform）

2 个答案: