1using System;
  2using System.Collections;
  3using System.ComponentModel;
  4using System.Data;
  5using System.Drawing;
  6using System.Web;
  7using System.Web.SessionState;
  8using System.Web.UI;
  9using System.Web.UI.WebControls;
 10using System.Web.UI.HtmlControls;
 11
 12using System.Text;
 13using System.Data.SqlClient;
 14using DataAccess;
 15
 16namespace TimeStamp
 17{
 18    /**//// <summary>
 19    /// WebForm1 的摘要说明。
 20    /// </summary>
 21    public class TimeStamp : System.Web.UI.Page
 22    {
 23        protected System.Web.UI.WebControls.TextBox tbKey;
 24        protected System.Web.UI.WebControls.TextBox tbValue;
 25        protected System.Web.UI.WebControls.TextBox tbTimeStamp;
 26
 27        private DataTable dt;
 28        protected System.Web.UI.WebControls.Button Button1;
 29        protected System.Web.UI.WebControls.Label Label1;
 30    
 31        protected string ConnectString = "server=oylb;User ID=sa;Password=;database=TimeStamp;Connection Reset=FALSE";
 32
 33        private void Page_Load(object sender, System.EventArgs e)
 34        {
 35            if (!IsPostBack)
 36            {
 37                BindData(1);
 38            }    
 39        }
 40
 41        //取得数据
 42        private void GetData(int kid)
 43        {
 44            DataSet ds = new DataSet();
 45
 46            String[] sArrayTableName = {"TimeStamp"};
 47            SqlHelper.FillDataset(ConnectString,CommandType.StoredProcedure,
 48                                    "GetData",ds,sArrayTableName,
 49                                        new SqlParameter("@KID",kid));
 50
 51            dt = ds.Tables["TimeStamp"];
 52
 53            //保存于Session，用于更新
 54            Session["TimeStamp"] = dt;
 55        }
 56
 57        //绑定数据到控件
 58        private void BindData(int kid)
 59        {
 60            GetData(kid);
 61
 62            Byte[] myByte;
 63
 64            this.tbKey.Text = dt.Rows[0]["KID"].ToString();
 65            this.tbValue.Text = dt.Rows[0]["Name"].ToString();
 66
 67            myByte = (System.Byte[])dt.Rows[0]["TimeStamp"];
 68
 69            this.tbTimeStamp.Text = Encoding.ASCII.GetString(myByte,0,myByte.Length);
 70        }
 71
 72        //更新数据
 73        private bool UpdateData()
 74        {
 75            dt = (DataTable)Session["TimeStamp"];
 76            
 77            DataRow row = dt.Rows[0];
 78
 79            row["Name"] = this.tbValue.Text.Trim();
 80
 81            dt.AcceptChanges();
 82
 83            int iEffect = SqlHelper.ExecuteNonQuery(ConnectString,"UpdateData",GetParam(row));
 84
 85            if (iEffect != 1)
 86            {
 87                return false;
 88            }
 89
 90            return true;
 91        }
 92
 93        //根据datarow获取参数
 94        private SqlParameter[] GetParam(DataRow row)
 95        {
 96            DataColumnCollection cols;
 97
 98            cols = row.Table.Columns;
 99
100            int iBound = cols.Count;
101                
102            SqlParameter[] Params = new SqlParameter[iBound];
103            SqlParameter Param = new SqlParameter();
104
105            string strColumnName;
106            int iIndex = 0;
107
108            object oRowValue = null;
109
110            foreach(DataColumn col in cols)
111            {
112                strColumnName = col.ColumnName;
113
114                oRowValue = row[col];
115
116                if (oRowValue == System.DBNull.Value)
117                {
118                    oRowValue = DBNull.Value;
119                }
120
121                if (col.DataType.ToString() == "System.Byte[]")
122                {
123                    //专门处理Timestamp
124                    Param = new SqlParameter("@"+strColumnName,SqlDbType.Timestamp, 8);
125                    Param.Direction = ParameterDirection.Input;
126                    Param.Value = oRowValue; 
127                }
128                else
129                {
130                    Param = new SqlParameter();
131
132                    Param.ParameterName = "@"+strColumnName;
133                    Param.SqlDbType = GetColSqlDbType(col);
134                    Param.Direction = ParameterDirection.Input;
135                    Param.Value = oRowValue;
136                }
137                
138                Params[iIndex] = Param;
139                iIndex ++;
140            }
141
142            return Params;
143        }
144
145        //转化类型
146        private SqlDbType GetColSqlDbType(DataColumn col)
147        {
148            string strType = col.DataType.ToString();
149
150            switch(strType)
151            {
152                case "System.Int32":
153                    return SqlDbType.Int;
154                case "System.DateTime":
155                    return SqlDbType.DateTime;
156                case "System.Double":
157                    return SqlDbType.Decimal;
158                case "System.String":
159                    return SqlDbType.Char;
160                case "System.Byte[]":
161                    return SqlDbType.Timestamp;
162                default:
163                    return SqlDbType.Char;
164            }
165        }
166        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
167        override protected void OnInit(EventArgs e)
168        {
169            //
170            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
171            //
172            InitializeComponent();
173            base.OnInit(e);
174        }
175        
176        /**//// <summary>
177        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
178        /// 此方法的内容。
179        /// </summary>
180        private void InitializeComponent()
181        {    
182            this.Button1.Click += new System.EventHandler(this.Button1_Click);
183            this.Load += new System.EventHandler(this.Page_Load);
184
185        }
186        #endregion
187
188        private void Button1_Click(object sender, System.EventArgs e)
189        {
190            if (UpdateData())
191            {
192                this.Label1.Text = "成功！";
193                BindData(1);
194            }
195            else
196            {
197                this.Label1.Text = "失败！";
198            }
199        }
200    }
201}
202