Question

在我将CustID int和自动增量放入数据库后，它会出错...但是我删除它之后...可以保存在数据库中...现在的问题我想在int或primarykey中添加CustID ..如何弹出/显示消息，如项目已保存？

这是我的SQL数据库..

Custid int (could not work) help
custname varchar50
custadd varchar50
custphone varchar
custemail varchar50

这些是我的代码：

public partial class NewCase : System.Web.UI.Page
{
    SqlConnection con =new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\WebSite6\\App_Data\\ASPNETDB.MDF;Integrated Security=True;User Instance=True");
    SqlCommand com = new SqlCommand("Select * from aspnet_Customer");

public void Bind()
{
    SqlDataAdapter da = new SqlDataAdapter(com);
    DataSet ds = new DataSet();
    con.Open();
    com.Connection = con;
    com.ExecuteNonQuery();
    da.Fill(ds, "aspnet_Customer");
    con.Close();
}


protected void Button1_Click1(object sender, System.EventArgs e)
{
    con.Open();
    SqlCommand comi = new SqlCommand("Insert into aspnet_Customer values (@Custname,@Custaddress,@Custemail,@Custphone)");
    comi.Parameters.Add("Custname", SqlDbType.VarChar, 50);
    comi.Parameters["Custname"].Value = TextBox3.Text;
    comi.Parameters.Add("Custaddress", SqlDbType.VarChar, 50);
    comi.Parameters["Custaddress"].Value = TextBox9.Text;
    comi.Parameters.Add("Custemail", SqlDbType.VarChar, 50);
    comi.Parameters["Custemail"].Value = TextBox10.Text;
    comi.Parameters.Add("Custphone", SqlDbType.VarChar, 50);
    comi.Parameters["Custphone"].Value = TextBox11.Text;


    comi.Connection = con;
    comi.ExecuteNonQuery();
    con.Close();
    Message.box("DATA ADDED SUCCESSFULLY!!");
    Bind();

}

}

Answer 1

如果您有自动增量列，则必须在INSERT INTO子句中列出列名，因此您无法插入所有列（您的自动增量列会自动生成）。

SqlCommand comi = new SqlCommand(
            "Insert into aspnet_Customer( Custname, Custaddress, Custemail, Custphone)
                  values (@Custname,@Custaddress,@Custemail,@Custphone)");

为什么我得到ExecuteNonQuery（）;做主键后出错？

1 个答案: