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Question

閱讀的問題：

我想讓如果值相同那就是TextBox2.Text和Label2.Text，我不會重定向到下一個頁面，而是我會要求輸入不同text.Here是我的代碼：

protected void Button1_Click(object sender, EventArgs e) 
{ 
    con.Open(); 
    SqlCommand cmd = new SqlCommand(); 
    cmd.Connection = con; 
    cmd = new SqlCommand("SELECT Question FROM Animals WHERE Question = @Question", con); 
    cmd.Parameters.AddWithValue("@Question", Label2.Text); 
    cmd.ExecuteNonQuery(); 
    dr = cmd.ExecuteReader(); 

    if (dr.Read()) 
    { 
     Response.Write("Enter different question"); 
    } 
    else 
    { 
     if(dr[0].ToString() != TextBox2.Text) 
     Session["question"] = Label2.Text; 
     Session["Animal3"] = TextBox1.Text; 
     Session["Question2"] = TextBox2.Text; 
     Session["Animal2"] = Label3.Text; 
     Session["Animal"] = Label4.Text; 

     Response.Redirect("~/StartGame2.aspx"); 
    } 

Answer 1

可以使用CompareValidator上TextBox2中

<asp:CompareValidator 
     id="Validator1" 
     ControlToValidate="TextBox2" 
     ControlToCompare="Label2" 
     Type="String" 
     Text="Enter different text." 
     runat="server" /> 

Answer 2

嘗試用它來取代你的方法：

 protected void Button1_Click(object sender, EventArgs e) 
    { 
     con.Open(); 
     SqlCommand cmd = new SqlCommand(); 
     cmd.Connection = con; 
     cmd = new SqlCommand("SELECT Question FROM Animals WHERE Question = @Question", con); 
     cmd.Parameters.AddWithValue("@Question", Label2.Text); 
     cmd.ExecuteNonQuery(); 
     dr = cmd.ExecuteReader(); 

     if (dr.Read()) 
     { 
      if (dr[0].ToString() == TextBox2.Text) 
      { 
       Response.Write("Enter different question"); 
       return; 
      } 
     } 

     Session["question"] = Label2.Text; 
     Session["Animal3"] = TextBox1.Text; 
     Session["Question2"] = TextBox2.Text; 
     Session["Animal2"] = Label3.Text; 
     Session["Animal"] = Label4.Text; 

     Response.Redirect("~/StartGame2.aspx"); 

    }