如何解决由于他的保护级别错误而无法访问？

我正在创建一个withdarw窗口我的数据库连接代码是正确的，它的显示结果是正确的，我想在下一个窗体上显示结果。我实施的代码为.give我错误“无法访问，由于保护级别”我搜索了很多代码，但没有得到任何解决方案。如何解决由于他的保护级别错误而无法访问？

这给这行错误“rece.Default.lblbal.Text = balance;”。

这是我的代码：

 namespace ATMManagementSystem 
     { 
     public partial class cust_cash_with_sav : Form 
     { 

     public cust_cash_with_sav() 
     { 
     InitializeComponent(); 
     } 
     #region Default Instance 

     public static cust_cash_with_sav defaultInstance; 

     /// <summary> 
     /// Added by the VB.Net to C# Converter to support default instance behavour in C# 
    /// </summary> 
    public static cust_cash_with_sav Default 
    { 
     get 
     { 
      if (defaultInstance == null) 
      { 
       defaultInstance = new cust_cash_with_sav(); 
       defaultInstance.FormClosed += new 
       FormClosedEventHandler(defaultInstance_FormClosed); 
      } 

      return defaultInstance; 
     } 
    } 

    static void defaultInstance_FormClosed(object sender, 
    FormClosedEventArgs e) 
    { 
     defaultInstance = null; 
    } 
    #endregion 

    SqlConnection con = new SqlConnection("Data Source=VAIO;Initial 
    Catalog=ATM;Integrated Security=True"); 
    SqlCommand cmd = new SqlCommand(); 
    SqlDataAdapter da; 
    DataSet ds; 
    int num1; 
    int num2; 
    int total1; 
    string balance; 
    public void button1_Click(object sender, EventArgs e) 
    { 
     string sql = default(string); 
     DataTable Log_in = new DataTable(); 

     try 
     { 
      con.Open(); 
      SqlCommand cmd = new SqlCommand("SELECT * FROM user_transaction 
      where pin_number = " + textBox2.Text + "", con); 
      cmd.Connection = con; 

      //da.SelectCommand = cmd; 
      da = new SqlDataAdapter(cmd); 


      da.Fill(Log_in); 
      if (Log_in.Rows.Count > 0) 
      { 

       balance = (string)(Log_in.Rows[0]["Total"].ToString()); 
       num1 = int.Parse(balance); 
       num2 = int.Parse(textBox1.Text); 

       if (num2 > 25000) 
       { 
        MessageBox.Show("You can Only Withdraw Php 25,000"); 
       } 
       else if (num2 < 200) 
       { 
        MessageBox.Show(" Mininum withdrawal is 200"); 
       } 
       else if (num1 < num2) 
       { 
        MessageBox.Show(" Insuffiecient balance"); 

       } 
       else 
       { 
        total1 = num1 - num2; 

        rece.Default.Show(); 
        rece.Default.lblbal.Text = balance; 
        rece.Default.lbldep.Hide(); 
        rece.Default.lblwith.Text = num2.ToString(); 
        rece.Default.lblnewbal.Text = total1.ToString(); 
        rece.Default.lblbal.Show(); 
        rece.Default.lbldep.Hide(); 
        rece.Default.lblwith.Show(); 
        rece.Default.lblnewbal.Show(); 
        //MsgBox("success") 
        rece.Default.lblname.Text = 
        Mainmenu.Default.lblname.Text; 
        label2.Text = total1.ToString(); 
        //this.Hide(); 


       } 
      } 
      else 
      { 


      } 

     } 
     catch (Exception) 
     { 
      // MessageBox.Show(" Pls. Enter Ammount!"); 
      //MsgBox(ex.Message) 
     } 
     textBox1.Text = ""; 


     } 
    } 
}

来源

2015-02-07 Chetan Gharat

你可以试试这个

//In Form1's 
using(rece form2 = new rece()) 
{ 

    form2.TheValue = someControlOnForm1.Text; 

}

而且......

//In rece form 
    //Create a public property to serve the value 
    public string TheValue 
    { 
     set { lblbal.Text = value;} 
    }

来源

2015-02-11 12:57:14

如何解决由于他的保护级别错误而无法访问？

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