不能从

• Z时代
• 2024-01-10
• 分类：问答

类

class cAccess 
    { 
     private static string usn1; 
     public static string usnt 
     { 
      set 
      { 
       usn1 = value; 
      } 
      get 
      { 
       string[] s = new string[3]; 
       DataSet dsa = new DataSet(); 
       SqlDataAdapter adp = new SqlDataAdapter(); 
       adp.SelectCommand = new SqlCommand("select * from access where id=" + usn1, connection.setCon()); 
       adp.Fill(dsa, "t"); 
       DataRow DBrow = dsa.Tables["t"].Rows[0]; 
       for (int i = 0; i < 3; i++) 
       { 
        s[i] = DBrow.ItemArray.GetValue(i).ToString(); 
       } 
       return s; 
      } 
     } 
    } 

我想从类返回s阵列，但返回变量时，我开始调试，它表明这个错误：不能从

The name 's' does not exist in the current context. Code works true but can't return s.

回答：

class cAccess 
{ 
    private static string usn1; 
    public string usnt 
    { 
     set 
     { 
     usn1 = value; 
     } 
     get 
     { 
     StringBuilder s = new StringBuilder(); 
     DataSet dsa = new DataSet(); 
     SqlDataAdapter adp = new SqlDataAdapter(); 
     adp.SelectCommand = new SqlCommand("select * from access where id=" + usn1, connection.setCon()); 
     adp.Fill(dsa, "t"); 
     DataRow DBrow = dsa.Tables["t"].Rows[0]; 
     for (int i = 0; i < 3; i++) 
     { 
     s.Append(DBrow.ItemArray.GetValue(i).ToString()); 
     } 
     usn1 = s.ToString(); 
     return(usn1); 
} 

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