manage/news/Add_news.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 Add_news : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ((Label)Master.FindControl("titleMsg")).Text = "管理栏目";

        }
    }

    // 初始化
    protected void ShowInfo()
    {
        Textarea1.Value = "";

        string sql = "select * from news where mc='" + rdlmc.SelectedValue + "'";
        //根据编号得到相应的记录
        SqlDataReader sdr = SqlHelper.ExecuteReader(sql);
        if (sdr.Read())
        {
            Textarea1.Value = sdr["nr"].ToString();
        }
        sdr.Close();
    }

    protected void btnAdd_Click(object sender, EventArgs e)
    {

        //设置添加或修改sql
        StringBuilder strSql = new StringBuilder();

        if (!SqlHelper.Exists("select count(*) from news where mc='" + rdlmc.SelectedValue + "'"))
        {
            strSql.Append(@"insert into News ( mc,nr ) ");
            strSql.Append(@" values (@mc,@nr)");
        }
        else
        {
            //更新   
            strSql.Append("update news set ");
            strSql.Append("nr = @nr ");
            strSql.Append("  where mc=@mc");
        }

        //设置参数
        SqlParameter[] parameters = new SqlParameter[] {