.NET进销存系统开发笔记------之Gridview应用

本人学习ASP.NET也是刚刚开始,尽管如此但还是按耐不住要把以前用ASP开发的基于WEB的进销存及OA系统用ASP.NET重写,此次重写将不仅是代码部份重写,数据库也将重新优化(主要是将会大量采用存储过程).我会将开发过程的大部分笔记和大家一起分享,本人才粗学浅,C#也是刚刚开始学习.如果有什么不对请大家不要见笑,还望多指教.

GridView应用一
本文将实现Gridview上添加/编辑/删除

点序号排序后


添加


编辑


删除

先看数据结构(上表的序号为Sequence字段作为排序用,不是UnitID编号)


代码部分:

<% @ Page Language="C#"  %>
<% @ Import Namespace="System.Data.SqlClient"  %>
<% @ Import Namespace="DBOperate"  %>
<% @ Import Namespace="NgcOA.Msg"  %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
< script  src ="../Js/GridViewHelper.js"  type ="text/javascript" ></ script >
< script  runat ="server" >

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)
            AddGlyph(GridView1, e.Row);
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            string KeyValue = GridView1.DataKeys[e.Row.RowIndex].Value.ToString();
            if (KeyValue == "0" && EditIndex == -1)        // we are not editing
                e.Row.Attributes.Add("isadd", "1");
            //string RowID = Convert.ToString(System.Web.UI.DataBinder.Eval(e.Row.DataItem, "UnitID"));
            //string Url = "Details.aspx?ID=" + RowID;        // create the Url to be executed when the "+" is clicked (YOU WILL CUSTOMIZE THIS TO YOUR NEEDS)
            //e.Row.Attributes.Add("href", Url);        // link to details
            //e.Row.Attributes.Add("open", "0");            // used by the detail table expander/contracter
            //e.Row.Attributes.Add("hascontent", "0");    // used to prevent excessive callbacks to the server
        }
        
    }

    public int EditIndex = -1;
    
    void AddGlyph(GridView grid, GridViewRow item)
    {
        if (grid.AllowSorting == false)
            return;
        Label glyph = new Label();
        glyph.EnableTheming = false;
        glyph.Font.Name = "webdings";
        glyph.Font.Size = FontUnit.XSmall;
        glyph.Text = (grid.SortDirection == SortDirection.Ascending ? "5" : " 6");

        // Find the column you sorted by
        for (int i = 0; i < grid.Columns.Count; i++)
        {
            string colExpr = grid.Columns[i].SortExpression;
            if (colExpr != "" && colExpr == grid.SortExpression)
            {
                item.Cells[i].Controls.Add(glyph);
            }
        }
    }

    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        string KeyValue = GridView1.DataKeys[e.RowIndex].Value.ToString();
        if (KeyValue != "0")
            return; // key value of 0 indicates the insert row
        DBObject myDb = new DBObject();
        myDb.SelectString = "SELECT UnitName FROM Base_ProductUnit WHERE UnitName='" + ((TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[1]).Text + "'";
        myDb.GetDR();
        if (myDb.SelectEmpty())
        {
            SqlDataSource ds = (SqlDataSource)FindControl(GridView1.DataSourceID);
            SqlConnection conn = new SqlConnection(ds.ConnectionString);
            conn.Open();
            string s = ds.InsertCommand;
            SqlCommand c = new SqlCommand(s, conn);

            SqlParameter p;
            foreach (System.Collections.DictionaryEntry x in e.NewValues)
            {
                p = new SqlParameter("@" + x.Key, x.Value);
                c.Parameters.Add(p);
            }
            c.ExecuteNonQuery();
        }
        else
        {
            string msg = Message.Show("您要添加的记录已经存在，无法无成此次操作！");
            Response.Write(msg);
        }
        myDb.DBClose();
    }

    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        EditIndex = e.NewEditIndex;
    }
</ script >

< html  xmlns ="http://www.w3.org/1999/xhtml"   >
< head  runat ="server" >
     < title > 无标题页 </ title >
      < link  href ="../Css/System.css"  rel ="STYLESHEET"  type ="text/css"   />
</ head >
< body >
     < form  id ="form1"  runat ="server" >
     < div >

        
         < asp:GridView  ID ="GridView1"  runat ="server"  AllowPaging ="True"  AllowSorting ="True"  AutoGenerateColumns ="False"  DataSourceID ="BaseUnitDS"  OnRowCreated ="GridView1_RowCreated"  OnRowEditing ="GridView1_RowEditing"  OnRowUpdating ="GridView1_RowUpdating"  DataKeyNames ="UnitID"  Width ="180px"  PageSize ="20" >
                 < Columns >
                     < asp:CommandField  ButtonType ="Image"  CancelImageUrl ="~/Images/Cancel.gif"  DeleteImageUrl ="~/Images/Delete.gif"  EditImageUrl ="~/Images/Edit.gif"  ShowDeleteButton ="True"  ShowEditButton ="True"  UpdateImageUrl ="~/Images/Update.gif" >
                         < HeaderStyle  BackColor ="#E0E0E0"  HorizontalAlign ="Left"  VerticalAlign ="Top"   />
                         < ItemStyle  HorizontalAlign ="Left"  VerticalAlign ="Top"  Width ="40px"   />
                     </ asp:CommandField >
                     < asp:BoundField  DataField ="UnitID"  HeaderText ="编号"  InsertVisible ="False"  ReadOnly ="True"
                    SortExpression ="UnitID"  Visible ="False"   />
                     < asp:TemplateField  HeaderText ="序号"  SortExpression ="Sequence" >
                         < EditItemTemplate >
                             < asp:TextBox  ID ="EditSequence"  CssClass ="base_tb"  runat ="server"  MaxLength ="15"  Text ='<%#  Bind("Sequence") % > ' Width="40px"> </ asp:TextBox >
                             < asp:CompareValidator  ID ="CompareValidator1"  runat ="server"  ControlToValidate ="EditSequence"  ErrorMessage ="*"  Operator ="DataTypeCheck"  Type ="Integer" ></ asp:CompareValidator >
                         </ EditItemTemplate >
                         < ItemStyle  HorizontalAlign ="Left"  VerticalAlign ="Top"  Width ="60px"   />
                         < HeaderStyle  HorizontalAlign ="Left"  VerticalAlign ="Top" />
                         < ItemTemplate >
                             < asp:Label  ID ="Sequence"  runat ="server"  Text ='<%#  Bind("Sequence") % > '> </ asp:Label >
                         </ ItemTemplate >
                     </ asp:TemplateField >                     
                     < asp:TemplateField  HeaderText ="单位名称"  SortExpression ="UnitName" >
                         < EditItemTemplate >
                             < asp:TextBox  ID ="EditUnitName"  CssClass ="base_tb"  runat ="server"  MaxLength ="15"  Text ='<%#  Bind("UnitName") % > ' Width="40px"> </ asp:TextBox >
                             < asp:RequiredFieldValidator  ID ="UnitNameRequiredFieldValidator"  runat ="server"  ControlToValidate ="EditUnitName"  Display ="Dynamic"  ErrorMessage ="此处不能为空!"  SetFocusOnError ="True" ></ asp:RequiredFieldValidator >
                         </ EditItemTemplate >
                         < ItemStyle  HorizontalAlign ="Left"  VerticalAlign ="Top"  Width ="80px" />
                         < HeaderStyle  HorizontalAlign ="Left"  VerticalAlign ="Top" />
                         < ItemTemplate >
                             < asp:Label  ID ="UnitName"  runat ="server"  Text ='<%#  Bind("UnitName") % > '> </ asp:Label >
                         </ ItemTemplate >
                     </ asp:TemplateField >
                 </ Columns >
                 < HeaderStyle  BackColor ="#E0E0E0"   />
             </ asp:GridView >
         &nbsp;
    
     </ div >
         < asp:SqlDataSource  ID ="BaseUnitDS"  runat ="server"  ConnectionString ="<%$ ConnectionStrings:NgcDataConnectionString %>"
            SelectCommand ="WM_ProductUnit_Select"  SelectCommandType ="StoredProcedure"  UpdateCommand ="UPDATE [Base_ProductUnit] SET [UnitName]=@UnitName,[Sequence]=@Sequence WHERE [UnitID]=@UnitID"  DeleteCommand ="DELETE FROM [Base_ProductUnit] WHERE [UnitID]=@UnitID"  InsertCommand ="INSERT INTO [Base_ProductUnit] ([UnitName],[Sequence]) VALUES (@UnitName,@Sequence)" >
         </ asp:SqlDataSource >

         </ form >
       < script  type ="text/javascript" >
        GridViewHelper.Init(document.all.GridView1, 100, 0);
     </ script >
</ body >
</ html >

 注明一下一些用到的js或类
GridViewHelper.js
出处:http://www.thecodeproject.com/aspnet/MasterDetail.asp
代码如下:(这个js很有用,可以实现Gridview上增加新建记录的图标,嵌套从表及自适应高度和宽度,产生标题的tooltips等)

function  GridViewHelperClass()
{
    function GridViewInit(idGrid, ExtraWidth, ExtraHeight)
    {
        var oTBODY = FindTBODY(idGrid);

        for(var i=1; ; i++)
        {
            try
            {
                if(oTBODY.childNodes[i].getAttribute("isadd") == null)
                    continue;
                // content looks like:
                // <input type="button" value="Edit" onclick="javascript:__doPostBack('GridView1','Edit$0')" />&nbsp;<input type="button" value="Delete" onclick="javascript:__doPostBack('GridView1','Delete$0')" />
                // replace Edit with Add, remove Delete
                //oTBODY.childNodes[i].childNodes[0] 某行的第一个单元
                if(oTBODY.childNodes[i].childNodes[0].childNodes[0].type=="text")
                    oTBODY.childNodes[i].childNodes[0].childNodes[0].value="Add";
                else
                    oTBODY.childNodes[i].childNodes[0].childNodes[0].src="../Images/Add.gif";

                var txt = oTBODY.childNodes[i].childNodes[0].innerHTML;
                var j = txt.indexOf("&nbsp;");
                oTBODY.childNodes[i].childNodes[0].innerHTML = txt.slice(0, j);
            }
            catch(e)
            {
                break;
            }
        }
        // put delete confirmations in, skip the header row
        for(var i=1; ; i++)
        {
            try
            {
                var ctl=oTBODY.childNodes[i].childNodes[0].childNodes[2];
                if(oTBODY.childNodes[i].getAttribute("isadd") == "1")
                    continue;
                /**//*window.alert(i+": "+ctl.outerHTML);
                window.alert(i+": "+ctl.onclick);
                window.alert(i+": "+ctl.tagName);*/
                
                if(ctl.tagName == "INPUT")
                {
                    var onc = ctl.onclick.toString();
                    // window.alert(onc);    // uncomment this to see what the onclick actually contains
                    // if(onc.indexOf("Delete$") == -1)
                    //    continue;    // don't want to add confirm to "update cancel"
                    var j = onc.indexOf("__do");
                    var k = onc.indexOf(")", j)+1;
            
                    onc="if(confirm('您确定要执行此操作?') == false) return(false);"+onc.slice(j, k);

                    ctl.onclick = onc;
                    ctl.outerHTML = ctl.outerHTML;        // if you don't do this then the onclick will not work. it is probably related to how the onclick is actually defined (see window.alert above)
                    // window.alert(ctl.outerHTML);
                }
                    
            }
            catch(e)
            {
                break;
            }
        }
        InitDrillDown(idGrid);
        ResizeMe(idGrid, ExtraWidth, ExtraHeight);
    }
    this.Init = GridViewInit;
    
    function ResizeMe(idGrid, ExtraWidth, ExtraHeight)
    {
        if(window.frameElement != null)
        {
            if(window.frameElement.tagName == "IFRAME")
            {
                // we are in an iframe
                
                // set the width to be really wide so there is no column wrapping
                window.frameElement.width = 10000;
            
                // now calculate the width required and set the frame width to it (plus a fudge factor)
                // window.alert("before width: "+GridViewHelper.CalcWidth(document.all.GridView1)+" "+ExtraWidth);
                window.frameElement.width = GridViewHelper.CalcWidth(idGrid)+ExtraWidth;
                
                // set the frame height to height of the generated document.
                // window.alert("height: "+document.body.scrollHeight);
                window.frameElement.height = document.body.scrollHeight+ExtraHeight;
                return;
            }
        }
        // get the container around the grid
        var Parent = idGrid.offsetParent;
        // make the parent really wide so that no columns will wrap
        Parent.style.width = "10000px";
        // calcuate the real width
        var RealWidth = GridViewHelper.CalcWidth(idGrid)+100;
        // set the parent width back to nothing    
        Parent.style.width = "";
        //set the grid to the size it needs to be
        idGrid.width=""+RealWidth;            
    }
    
   // change the onclick function for the select buttons
    function InitDrillDown(idGrid)
    {
        var oTBODY= FindTBODY(idGrid);
        for(var i=0; ; i++)
        {
            try
            {
                var ctl=oTBODY.childNodes[i].childNodes[0];
                var selectctl = ctl.childNodes[ctl.childNodes.length-1]
                if(selectctl.tagName == "INPUT")
                {
                    var onc = selectctl.onclick.toString();
                    // window.alert(onc);    // uncomment this to see what the onclick actually contains
                    if(onc.indexOf("Select$") == -1)
                        continue;    // probably an Add row line
                    onc = "return(GridViewHelper.DrillDownOrUp(this));"
                    selectctl.onclick = onc;
                    selectctl.outerHTML = selectctl.outerHTML;        // if you don't do this then the onclick will not work. it is probably related to how the onclick is actually defined (see window.alert above)
                }
            }
            catch(e)
            {
                break;
            }
        }
    }

    function GetParentObject(o, tagName)
    {
        srcElem = o;
        //crawl up to find the table
        while (srcElem.tagName != tagName)
            srcElem = srcElem.parentElement;
        return(srcElem);
    }
    function RowObjectToIndex(oTR)
    {
        if(oTR == null)
            return(-1);

        var oTABLE = GetParentObject(oTR, "TABLE");
        // find the row index of our row
        var i;
        for(i=0; i<oTABLE.rows.length; i++)
        {
            if(oTABLE.rows[i] == oTR)
            {
                return(i);
            }
        }
    }
    function DrillDownOrUpX(This)
    {
        var oRow = GetParentObject(This, "TR");
            // window.alert("oRow: "+oRow.outerHTML);
        var RowIndex = RowObjectToIndex(oRow)
        var oTable = GetParentObject(This, "TABLE");
            // window.alert("in drill: open='"+oRow.open+"' hascontent='"+oRow.hascontent+"'");
        var oPlusMinus = oRow.firstChild.childNodes[4];
        if(oRow.open == "1")
        {
            var DetailsRow = oTable.rows[RowIndex+1];
            DetailsRow.style.display="none";
            oRow.open = "0";
            var Gif = oPlusMinus.src;
            var iii = Gif.lastIndexOf("/");
            Gif = Gif.slice(0, iii)+"/Plus.gif";
            oPlusMinus.src = Gif;
            return(false);
        }
        if(oRow.hascontent == "1")
        {
            var DetailsRow = oTable.rows[RowIndex+1];
            DetailsRow.style.display="block";
            oRow.open = "1";
            var Gif = oPlusMinus.src;
            var iii = Gif.lastIndexOf("/");
            Gif = Gif.slice(0, iii)+"/Minus.gif";
            oPlusMinus.src = Gif;
            return(false);
        }
                
        var ColumnCount = oRow.cells.length;
        // need to add the row
        var NewRow = oTable.insertRow(RowIndex+1);
        var NewCell = NewRow.insertCell(0);
        NewCell.setAttribute("colSpan", ColumnCount.toString());
            
        var CellContent =
            "<table cellpadding='0' cellspacing='0'>"+
            "<tr><td><iframe src='"+oRow.href+"' frameborder='0' width='100%' height='200'></iframe></td></tr>"+
            "</table>";
        // window.alert(CellContent);
        // window.prompt("", oRow.href);
        NewCell.innerHTML = CellContent;
        // window.alert("NewRow: "+NewRow.outerHTML);
        oRow.open = "1";
        oRow.hascontent = "1";
        var Gif = oPlusMinus.src;
        var iii = Gif.lastIndexOf("/");
        Gif = Gif.slice(0, iii)+"/Minus.gif";
        oPlusMinus.src = Gif;
        // window.alert("oRow: "+oRow.outerHTML);
        return(false);
    }
    this.DrillDownOrUp = DrillDownOrUpX;
    function FindTBODY(idGrid)
    {
        if(idGrid.firstChild.tagName == "TBODY")
            return(idGrid.firstChild);
        // there is a caption, so go down one more level
        return(idGrid.firstChild.nextSibling);        
    }
    
    function CalcWidth(idGrid)
    {
        var oTBODY=FindTBODY(idGrid);
        var oTR = oTBODY.firstChild;    // get the first row object
        var oLastCell = oTR.cells[oTR.cells.length-1];

         var kb=0;
         var r = oLastCell;
        while(r)
        {
            kb+=r["offsetLeft"];
            r=r.offsetParent
          }
          kb += oLastCell.offsetWidth;
          return kb;
    }
    this.CalcWidth = CalcWidth;


    function AddToolTips(idGrid, ToolTips)
    {
        var oTBODY=FindTBODY(idGrid);
        var oTR = oTBODY.firstChild;// get the first row object which contains the column titles
        if(ToolTips.length > oTR.children.length)
            ToolTips.length = oTR.children.length;
        for(var i=0; i<ToolTips.length; i++)
        {
            var oChild = oTR.children[i];
            // window.alert("OOO: "+oChild.outerHTML);
            oChild.title = ToolTips[i];
        }
    }
    this.AddToolTips = AddToolTips;
}


var  GridViewHelper  =   new  GridViewHelperClass();

<%@ Import Namespace="DBOperate" %>
借用网上一个网友的数据库控制类，自己实在懒得写，碰巧看到也就拿来自己用了(在判断添加新数据时是否重复用到)

using  System;
using  System.Data;
using  System.Data.SqlClient;
using  System.Configuration;
using  System.Web.UI.WebControls;

namespace  DBOperate
{
    /**//**/
    /**//// <summary>
    /// 创建一个数据库对象，以实现数据操作。
    /// </summary>
    public class DBObject
    {
        private string ConnectionString;
        private SqlConnection objConn;
        private string objSelectString;
        private string objInsertString;
        private string objUpdateString;
        private string objDeleteString;
        private SqlDataReader objDR;
        private SqlCommand objCmd;
        private string objErrMessage = null;
        private string tempErrMessage = null;
        private SqlDataAdapter objDA;
        private DataSet objDS;
        private DataView objDW;
        private GridView objGV;
        private string objViewRowFilter = null;
        private string objViewSort = null;
        public DBObject()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
            DBConn();
        }
        private void DBConn()
        {
            ConnectionString = ConfigurationManager.ConnectionStrings["NgcDataConnectionString"].ConnectionString;
            objConn = new SqlConnection(ConnectionString);
            objConn.Open();
        }
        public void DBClose()
        {
            objConn.Close();
        }

        public string SelectString
        {
            set
            {
                objSelectString = value;
            }
        }
        public string InsertString
        {
            set
            {
                objInsertString = value;
                DBInsert();
            }
        }
        public string UpdateString
        {
            set
            {
                objUpdateString = value;
                DBUpdate();
            }
        }
        public string DeleteString
        {
            set
            {
                objDeleteString = value;
                DBDelete();
            }
        }
        public string ErrMessage
        {
            get
            {
                tempErrMessage = objErrMessage;
                objErrMessage = null;
                return tempErrMessage;
            }
        }
        public SqlDataReader DR
        {
            get
            {
                GetDR();
                return objDR;
            }
        }
        public void DRClose()
        {
            objDR.Close();
        }
        public void GetDR()
        {
            try
            {
                using (objCmd = new SqlCommand(objSelectString, objConn))
                {
                    objDR = objCmd.ExecuteReader();
                }
            }
            catch (System.Exception e)
            {
                objErrMessage += "数据读取出错：";
                objErrMessage += "<br>";
                objErrMessage += e.Message;
                objErrMessage += "<br>";
            }
        }
        public void objDRRead()
        {
            objDR.Read();
        }
        public bool SelectEmpty()
        {
            if (objDR.Read()) return false;
            else return true;
        }
        public string GetDRItem(string objDRItem)
        {
            return objDR[objDRItem].ToString();
        }
        public DataSet DS
        {
            get
            {
                try
                {
                    using (objDA = new SqlDataAdapter(objSelectString, objConn))
                    {
                        objDS = new DataSet();
                        objDA.Fill(objDS);
                    }
                }
                catch (System.Exception e)
                {
                    objErrMessage += "数据读取出错：";
                    objErrMessage += "<br>";
                    objErrMessage += e.Message;
                    objErrMessage += "<br>";
                }
                return objDS;
            }
        }
        public DataView DW
        {
            get
            {
                try
                {
                    using (objDA = new SqlDataAdapter(objSelectString, objConn))
                    {
                        objDS = new DataSet();
                        objDA.Fill(objDS);
                        objDW = new DataView(objDS.Tables[0]);
                        objDW.RowFilter = objViewRowFilter;
                        objDW.Sort = objViewSort;
                    }
                }
                catch (System.Exception e)
                {
                    objErrMessage += "数据读取出错：";
                    objErrMessage += "<br>";
                    objErrMessage += e.Message;
                    objErrMessage += "<br>";
                }
                return objDW;
            }
        }
        public GridView DGridBindDS
        {
            set
            {
                objGV = value;
                BindDS();
            }
        }
        public GridView DGridBindDR
        {
            set
            {
                objGV = value;
                BindDR();
            }
        }
        public string ViewRowFilter
        {
            set
            {
                if (objViewRowFilter == null)
                {
                    objViewRowFilter = value;
                }
                else
                {
                    objViewRowFilter += " and ";
                    objViewRowFilter += value;
                }
            }
        }
        public string ViewSort
        {
            set
            {
                objViewSort = value;
            }
        }
        private void BindDR()
        {
            try
            {
                using (objCmd = new SqlCommand(objSelectString, objConn))
                {
                    objDR = objCmd.ExecuteReader();
                    objGV.DataSource = objDR;
                    objGV.DataBind();
                    objDR.Close();
                }
            }
            catch (System.Exception e)
            {
                objErrMessage += "数据读取出错：";
                objErrMessage += "<br>";
                objErrMessage += e.Message;
                objErrMessage += "<br>";
            }
        }
        private void BindDS()
        {
            try
            {
                using (objDA = new SqlDataAdapter(objSelectString, objConn))
                {
                    objDS = new DataSet();
                    objDA.Fill(objDS);
                    objGV.DataSource = objDS;
                    objGV.DataBind();
                }
            }
            catch (System.Exception e)
            {
                objErrMessage += "数据读取出错：";
                objErrMessage += "<br>";
                objErrMessage += e.Message;
                objErrMessage += "<br>";
            }
        }

        private void DBInsert()
        {
            using (objCmd = new SqlCommand(objInsertString, objConn))
            {
                try
                {
                    objCmd.ExecuteNonQuery();
                }
                catch (System.Exception e)
                {
                    objErrMessage += "数据插入出错：";
                    objErrMessage += "<br>";
                    objErrMessage += e.Message;
                    objErrMessage += "<br>";
                }
            }
        }
        private void DBUpdate()
        {
            using (objCmd = new SqlCommand(objUpdateString, objConn))
            {
                try
                {
                    objCmd.ExecuteNonQuery();
                }
                catch (System.Exception e)
                {
                    objErrMessage += "数据更新出错：";
                    objErrMessage += "<br>";
                    objErrMessage += e.Message;
                    objErrMessage += "<br>";
                }
            }
        }
        private void DBDelete()
        {
            using (objCmd = new SqlCommand(objDeleteString, objConn))
            {
                try
                {
                    objCmd.ExecuteNonQuery();
                }
                catch (System.Exception e)
                {
                    objErrMessage += "数据删除出错：";
                    objErrMessage += "<br>";
                    objErrMessage += e.Message;
                    objErrMessage += "<br>";
                }
            }
        }
    }
}

<%@ Import Namespace="NgcOA.Msg" %>
弹出消息的类，也是用网上现成的．

using  System;
using  System.Data;
using  System.Configuration;
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;

namespace  NgcOA.Msg
{

    /**//// <summary>
    /// Message 的摘要说明
    /// </summary>
    public class Message
    {
        public Message()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }

        public static string Show(string strMsg)
        {

            //这里0就指strMsg这东西,1就是指\这东西.
            return String.Format("<script language={1}javascript{1}>alert({1}{0}{1});</script>", strMsg, "\"");
        }

    }
}

此外还将用到一个存储过程

CREATE   PROCEDURE  WM_ProductUnit_Select 
AS
declare   @num   int
begin
set   @num = ( SELECT   isnull ( MAX (Sequence), 0 )  FROM  Base_ProductUnit) + 1
SELECT   ' 0 '   AS   [ UnitID ] ,  ''   AS   [ UnitName ] ,  str ( @num )  AS   [ Sequence ]
UNION
SELECT   [ UnitID ] ,  [ UnitName ] ,  [ Sequence ]
FROM   [ Base_ProductUnit ]  
ORDER   BY   [ Sequence ]   DESC
end
GO

下次将介绍实现如下的嵌套效果