SQL Server错误:ExecuteNonQuery:连接属性尚未初始化

问题描述

我正在尝试使用ASP.Net和C#开发一个示例注册页面.我正在调用存储过程以将数据插入数据库.我的数据库是SQL Server2008.

I am trying to develop a sample registration page using ASP.Net and C#. I am calling a stored procedure to insert the data to database. My database is SQL Server 2008.

这是我的代码:

public partial class Sample : System.Web.UI.Page
{
   SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["dbconnection"].ToString());
   string str;

protected void Page_Load(object sender, EventArgs e)
{
    rbt_Male.Checked = true;
}

protected void btn_Submit_Click(object sender, EventArgs e)
{
    string @Name = txtbx_Name.Text;
    string @Gender_male = rbt_Male.Text;
    string @Gender_Female = rbt_Female.Text;
    string @Email = txtbx_Email.Text;
    DateTime @Dob = Convert.ToDateTime(txt_Dob.Text);
    submitdata();
}

protected void submitdata()
{
    try
    {
        SqlCommand cmd = new SqlCommand();
        cmd.Parameters.Clear();
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.CommandText = "insertdata";

        if (rbt_Male.Checked)
        {
            cmd.Parameters.AddWithValue("@Name", txtbx_Name.Text);
            cmd.Parameters.AddWithValue("@Gender_Male", rbt_Male.Text);
            cmd.Parameters.AddWithValue("@Email", txtbx_Email.Text);
            cmd.Parameters.AddWithValue("@Dob", Convert.ToDateTime(txt_Dob.Text));
        }
        else if (rbt_Female.Checked)
        {
            cmd.Parameters.AddWithValue("@Name", txtbx_Name.Text);
            cmd.Parameters.AddWithValue("@Gender_Female", rbt_Male.Text);
            cmd.Parameters.AddWithValue("@Email", txtbx_Email.Text);
            cmd.Parameters.AddWithValue("@Dob", Convert.ToDateTime(txt_Dob.Text));
        }

        if (con.State == ConnectionState.Closed)
            con.Open();

        cmd.ExecuteNonQuery();

        lbl_Errormsg.Visible = true;
        lbl_Errormsg.Text = "Record Inserted Successfully";
        con.Close();
    }
    catch (Exception ex)
    {
        lbl_Errormsg.Visible = true;
        lbl_Errormsg.Text = ex.Message;
    }

我收到错误消息

我在 cmd.ExecuteNonQuery();

请帮助我.

我的存储过程是

ALTER Procedure insertdata
(
 @Name Varchar(20),
 @Gender Varchar(6),
 @Email Varchar(20),
 @Dob date
)
As
 Begin
   Insert into samplelogintable (Name, Gender, Email, Dob)
   Values(@Name, @Gender, @Email, @Dob)
 End

推荐答案

您尚未将命令 cmd 与SqlConnection关联，这就是为什么会出现错误的原因.

You haven't associated your command cmd with your SqlConnection, that is why you are getting the error.

您需要指定:

cmd.Connection = con;

在您的 submitdata()方法中.

由于SqlCommand实现 IDisposable ，因此如果使用它在using块之内，例如:

Since SqlCommand implements IDisposable, its better if you use it within using block like:

using (SqlCommand cmd = new SqlCommand())
{

    cmd.Parameters.Clear();
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandText = "insertdata";
    cmd.Connection = con;
    .... your code

}

这篇关于SQL Server错误:ExecuteNonQuery:连接属性尚未初始化的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！