viele Checkboxliste speichern nicht in der Datenbank

Question

ich einige Code tun Daten zu speichern, und ich tue Code für Checkboxlist es in Daten zu speichern, ist es Arbeit mit nur einer Checkbox, wenn ich zwei Kontrollkästchen wählen, speichern es ist nur die erste

wie diese

page

database

asp.net Code

<table style="height: 172px; margin-top: 15px;margin-top:10px;"> 
    <tr> 
     <td colspan="5" class="auto-style5" style="padding-left:250px; font-size:29px"><strong>Faculty Members</strong> 
     </td> 
    </tr> 
    <tr> 
     <td class="auto-style4" style="width: 171px; font-size:20px">Frist Name: 
     </td> 
     <td class="auto-style1"> 
      <asp:TextBox ID="txt_fname" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
     <td class="auto-style4" style="width: 108px; font-size:20px; padding-left:20px;">Last Name: 
     </td> 
     <td class="auto-style1"> 
      <asp:TextBox ID="txt_lname" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
    </tr> 
    <tr> 
     <td class="auto-style4" style="height: 34px; width: 171px; font-size:20px">Specialization: 
     </td> 
     <td class="auto-style1" style="height: 34px"> 
      <asp:TextBox ID="TextBox1" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
     <td class="auto-style4" style="height: 34px; width: 108px; font-size:20px; padding-left:20px;">Degee: 
     </td> 
     <td class="auto-style1" style="height: 34px"> 
      <asp:TextBox ID="txt_degree" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
    </tr> 
    <tr> 
     <td class="auto-style4" style="width: 171px; font-size:20px">Addrss: 
     </td> 
     <td class="auto-style1"> 
      <asp:TextBox ID="txt_address" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
     <td class="auto-style4" style="width: 128px; font-size:20px; padding-left:20px;">PhoneNumber: 
     </td> 
     <td class="auto-style1"> 
      <asp:TextBox ID="txt_phone" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
    </tr> 
    <tr> 
     <td class="auto-style4" style="width: 171px; font-size:20px">Subject_ID: 
     </td> 
     <td class="auto-style1"> 
      <asp:CheckBoxList ID="CheckBoxList1" runat="server"> 
       <asp:ListItem>DataBases</asp:ListItem> 
       <asp:ListItem>Programming 1</asp:ListItem> 
       <asp:ListItem>programming 2</asp:ListItem> 
      </asp:CheckBoxList> 
     </td> 
    </tr> 
    <tr> 
     <td class="auto-style4" style="width: 291px; font-size:20px">Faculty Members Number: 
     </td> 
     <td class="auto-style1"> 
      <asp:TextBox ID="txt_Snumber" runat="server" style="width: 171px"></asp:TextBox> 
     </td> 
     <td colspan="2" class="auto-style4" style="width: 108px; padding-left:50px"> 
      <asp:Button ID="Button1" runat="server" Text="Save" OnClick="Button1_Click" /> 
     </td> 
    </tr> 
    <tr> 
     <td colspan="4" style="text-align:center"> 
      <asp:Label ID="Label1" runat="server" Text="Label" Visible="False"></asp:Label> 
     </td> 
    </tr> 
</table>][1] 

C# -Code

public partial class admins : System.Web.UI.Page 
{ 
    SqlConnection con = new SqlConnection(@"Data Source=DESKTOP-677TN4G\SQLEXPRESS;Initial Catalog=homework;Persist Security Info=True;User ID=sa;Password=123456"); 

    protected void Page_Load(object sender, EventArgs e) 
    { 
     con.Open(); 
    } 
    protected void Button1_Click(object sender, EventArgs e) 
    { 
     SqlCommand cmd = new SqlCommand("insert into Staff values('" + txt_fname.Text + "','" + txt_lname.Text + "','" + txt_Snumber.Text + "','" + txt_degree.Text + "','" + txt_address.Text + "','" + txt_phone.Text + "','" + CheckBoxList1.SelectedValue + "','" + txt_Snumber.Text + "')", con); 
     cmd.ExecuteNonQuery(); 
     con.Close(); 
     Label1.Visible = true; 
     Label1.Text = "Data is Saved"; 
     txt_Snumber.Text = ""; 
     txt_fname.Text = ""; 
     txt_lname.Text = ""; 
     txt_address.Text = ""; 
     txt_degree.Text = ""; 
     txt_phone.Text = ""; 
     txt_Snumber.Text = ""; 
    } 
} 

Answer 1

Sie müssen Text ausgewählter Kontrollkästchen beizutreten.

Zum Beispiel

string subjects = string.Join(",", CheckBoxList1.Items.Cast<ListItem>() 
    .Where(item => item.Selected) 
    .Select(item => item.Text) 
    .ToList()); 

FYI: Sie wollen mit parametrisierte Abfrage prüfen, um SQL-Injection-Angriff zu verhindern.