.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, 
1000);
    
</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),0FROM Base_ProductUnit)+1
SELECT '0' AS [UnitID]'' AS [UnitName]str(@numAS [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

posted @ 2006-04-24 22:09 李振波 阅读(...) 评论(...) 编辑 收藏