System/Sys_Course_Add.aspx.cs

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

public partial class System_Sys_Course_Add : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string kcname =txt_user .Text;
        string sql = "select * from X_Course where X_Course_Name='" + kcname + "'";
        if (!DB.isExists(sql))
        {

            string sql2 = "insert into X_Course(X_Course_Name)values('" + txt_user.Text + "')";
            try
            {
                OleDbConnection cn = DB.OpenConnection();
                OleDbCommand cmd = new OleDbCommand(sql2, cn);
                cmd.ExecuteNonQuery();
                cn.Close();
                cn.Dispose();
                Common.ShowMessage(this.Page, "添加成功！", "");

            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
                
            }
        }
        else
        {
            Common.ShowMessage(this.Page, "课程名已存在！", "");
            txt_user.Text = "";
            txt_user.Focus();
        }
    }
}