instore/instore_Add.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Text;
using System.Data.SqlClient;

public partial class instore_Add : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DataSet ds = SqlHelper.ExecuteforDataSet("select pid,pname from products");
            ddlpid.DataSource = ds;
            ddlpid.DataTextField = "pname";
            ddlpid.DataValueField = "pid";
            ddlpid.DataBind();
            ds = SqlHelper.ExecuteforDataSet("select sid,sname from supplier");
            ddlsid.DataSource = ds;
            ddlsid.DataTextField = "sname";
            ddlsid.DataValueField = "sid";
            ddlsid.DataBind();

            txt_eno.Text = Session["lname"].ToString();
        }
    }
    protected void btnSave_Click(object sender, EventArgs e)
    {

        StringBuilder strSql = new StringBuilder();
        strSql.Append(@"insert into Instore ( pid,sid,quantity,eno,indate ) ");
        strSql.Append(@" values (@pid,@sid,@quantity,@eno,@indate)");

        //设置参数
        SqlParameter[] parameters = new SqlParameter[] {
            new SqlParameter("@pid", SqlDbType.Int,4),
            new SqlParameter("@sid", SqlDbType.Int,4),
            new SqlParameter("@quantity", SqlDbType.Int,4),
            new SqlParameter("@eno", SqlDbType.VarChar,20),
            new SqlParameter("@indate", SqlDbType.DateTime,8)        };

        parameters[0].Value = ddlpid.SelectedValue;
        parameters[1].Value = ddlsid.SelectedValue;
        parameters[2].Value = int.Parse(txt_quantity.Text);
        parameters[3].Value = txt_eno.Text;
        parameters[4].Value = DateTime.Now;

        SqlHelper.ExecuteNonQuery(strSql.ToString(), CommandType.Text, parameters);

        if (SqlHelper.Exists("select count(*) from store where pid=" + ddlpid.SelectedValue))
        {
            SqlHelper.ExecuteNonQuery("update store set quantity=quantity+" + txt_quantity.Text + " where pid=" + ddlpid.SelectedValue);
        }