Repeter实现增，删，改，以及分页和排序

这周不算太忙，就动手联系了一下Repeter的分页和排序，顺便利用中介实现了增，删，改的功能。分页和排序主要用到了PagedDataSource类和DataView对象，这样实现起来就不是很复杂了。做的比较简陋，有需要的朋友可以看一下。

效果图如下：

前台代码：

 

    <form id="form1" runat="server">
        <div>
            <asp:Panel ID="Panel1" runat="server" Height="50px" Visible="False" Width="1029px">
                <asp:Label ID="lblCompanyName" runat="server" Text="CompanyName" Visible="False"></asp:Label>
                <asp:TextBox ID="txtCompanyName" runat="server" Visible="False"></asp:TextBox>
                <asp:Label ID="lblName" runat="server" Text="ContactName" Visible="False"></asp:Label>
                <asp:TextBox ID="txtContactName" runat="server" Visible="False"></asp:TextBox>
                <asp:Label ID="lblAddress" runat="server" Text="Address" Visible="False"></asp:Label>
                <asp:TextBox ID="txtAddress" runat="server" Visible="False"></asp:TextBox>
                <asp:Label ID="lblCity" runat="server" Text="City" Visible="False"></asp:Label>
                <asp:TextBox ID="txtCity" runat="server" Visible="False" Width="129px"></asp:TextBox>
                <asp:Button ID="btnUpdate" runat="server" Text="更新" CommandName="Update" OnClick="btnUpdate_Click" />
                <asp:Button ID="btnInsert" runat="server" Text="新增" OnClick="btnInsert_Click" />
                <asp:Button ID="Button1" runat="server" Text="取消" CommandName="Cancel" OnClick="Button1_Click" />
            </asp:Panel>
            <asp:Repeater ID="Repeater1" runat="server" OnItemCommand="Repeater1_ItemCommand"
                OnItemDataBound="Repeater1_ItemDataBound">
                <HeaderTemplate>
                    <table border="0" width="100%">
                        <tr>
                            <th align="left">
                                SupplierID</th>
                            <th align="left">
                                CompanyName</th>
                            <th align="left">
                                ContactName</th>
                            <th align="left">
                                Address</th>
                            <th align="left">
                                City</th>
                            <th>
                            </th>
                            <th>
                            </th>
                            <th>
                            </th>
                        </tr>
                </HeaderTemplate>
                <ItemTemplate>
                    <tr id="Item" runat="server">
                        <td>
                            <asp:Label ID="lblID" runat="server" Text='<%#Eval("SupplierID") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblCompanyName" runat="server" Text='<%#Eval("CompanyName") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblName" runat="server" Text=' <%#Eval("ContactName") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblAddress" runat="server" Text='<%#Eval("Address") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblCity" runat="server" Text='<%#Eval("City") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Button ID="Edit" runat="server" Text="编辑" CommandName="Edit" /></td>
                        <td>
                            <asp:Button ID="Delete" runat="server" Text="删除" CommandName="Delete" /></td>
                        <td>
                            <asp:Button ID="New" runat="server" Text="新增" CommandName="New" /></td>
                    </tr>
                </ItemTemplate>
                <AlternatingItemTemplate>
                    <tr bgcolor="#e8e8e8" id="Alter" runat="server">
                        <td>
                            <asp:Label ID="lblID" runat="server" Text='<%#Eval("SupplierID") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblCompanyName" runat="server" Text='<%#Eval("CompanyName") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblName" runat="server" Text=' <%#Eval("ContactName") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblAddress" runat="server" Text='<%#Eval("Address") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lblCity" runat="server" Text='<%#Eval("City") %>'></asp:Label>
                        </td>
                        <td>
                            <asp:Button ID="Edit" runat="server" Text="编辑" CommandName="Edit" /></td>
                        <td>
                            <asp:Button ID="Delete" runat="server" Text="删除" CommandName="Delete" /></td>
                        <td>
                            <asp:Button ID="New" runat="server" Text="新增" CommandName="New" /></td>
                    </tr>
                </AlternatingItemTemplate>
                <FooterTemplate>
                    </table>
                </FooterTemplate>
            </asp:Repeater>
            <asp:Label ID="lblPage" runat="server"></asp:Label>
            <asp:Label ID="lblCount" runat="server"></asp:Label>
            <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="上一页" />
            <asp:Button ID="btnPage" runat="server" OnClick="btnPage_Click" Text="下一页" />
            <asp:Button ID="btnSort" runat="server" Text="排序" OnClick="btnSort_Click" /></div>
    </form>

 

后台代码：

 

    string ConStr = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString;
    SqlConnection Con;

    protected void Page_Load(object sender, EventArgs e)
    ...{
        if (!IsPostBack)
        ...{
            //设置默认的排序顺序
            ViewState["CompanyName"] = "SupplierID";
            ViewState["Direction"] = "ASC";
            ViewState["LineNo"] = 0;
            //初始化的时候默认显示第一页
            lblCount.Text = "1";
            BindRepeter();
        }
    }

    //判断命令
    protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
    ...{
        String Index = ((Label)Repeater1.Items[e.Item.ItemIndex].FindControl("lblID")).Text;
        Session["ID"] = Index;
        //编辑模式
        if (e.CommandName == "Edit")
        ...{
            string CompanyName = ((Label)(Repeater1.Items[e.Item.ItemIndex].FindControl("lblCompanyName"))).Text;
            string Name = ((Label)(Repeater1.Items[e.Item.ItemIndex].FindControl("lblName"))).Text;
            string Address = ((Label)(Repeater1.Items[e.Item.ItemIndex].FindControl("lblAddress"))).Text;
            string City = ((Label)(Repeater1.Items[e.Item.ItemIndex].FindControl("lblCity"))).Text;
            txtCompanyName.Text = CompanyName;
            txtContactName.Text = Name;
            txtAddress.Text = Address;
            txtCity.Text = City;
            if (Panel1.Visible == false)
            ...{
                ShowMessage("进入编辑模式");

            }
            SetDisplayTrue();
            btnInsert.Visible = false;
            btnUpdate.Visible = true;
            Button1.Visible = true;
        }
        //删除
        else if (e.CommandName == "Delete")
        ...{
            if (Panel1.Visible == true)
            ...{
                ShowMessage("编辑模式下禁止删除");
            }
            else
            ...{
                SetDisplayFalse();
                string DeleteStr = "DELETE FROM Suppliers WHERE SupplierID='" + Index + "'";
                Con =  new SqlConnection(ConStr);
                SqlCommand DeleteCmd = new SqlCommand(DeleteStr,Con);
                try
                ...{
                    Con.Open();
                    DeleteCmd.ExecuteNonQuery();
                    ShowMessage("删除成功");
                    BindRepeter();
                }
                catch (Exception ex)
                ...{
                    ShowMessage("删除有错误，请检查");
                }
                finally
                ...{
                    Con.Dispose();
                }
                
            }
        }//新增
        else if (e.CommandName == "New")
        ...{
            if (Panel1.Visible == true)
            ...{
                ShowMessage("编辑模式下禁止添加新行");
            }
            else
            ...{
                SetDisplayTrue();
                ClearWord();
                btnInsert.Visible = true;
                btnUpdate.Visible = false;
                Button1.Visible = true;
            }

        }
    }

    //绑定Repeter
    private void BindRepeter()
    ...{
        string QueryCon = "SELECT SupplierID,CompanyName,ContactName,Address,City FROM Suppliers";
        Con = new SqlConnection(ConStr);
        SqlDataAdapter NorthWindDa = new SqlDataAdapter(QueryCon, ConStr);
        DataSet Ds = new DataSet();
        NorthWindDa.Fill(Ds, "Suppliers");
        //Repeater1.DataKeyNames = new string[] { "SupplierID" };
        DataView Dv = Ds.Tables["Suppliers"].DefaultView;
        //排序表达式
        string SortExpress = (string)ViewState["CompanyName"] + " " + (string)ViewState["Direction"];
        Dv.Sort = SortExpress;
        //绑定数据源
        //Repeater1.DataSource = Ds.Tables["Suppliers"];
        //利用PagedDataSource进行分页
        PagedDataSource PageDs = new PagedDataSource();
        PageDs.DataSource = Dv;
        PageDs.AllowPaging = true;
        PageDs.PageSize = 10;
        int CurrentPage = Convert.ToInt32(lblCount.Text);
        //当前页
        PageDs.CurrentPageIndex = CurrentPage-1;
        btnPage.Enabled = true;
        Button2.Enabled = true;
        if (CurrentPage == 1)
        ...{
            Button2.Enabled = false;
        }
        if (CurrentPage == PageDs.PageCount)
        ...{
            btnPage.Enabled = false;
        }
        //PageCount = PageDs.PageCount;
        lblPage.Text = "共" + PageDs.PageCount + "页,当前在第";
        //将PageDs作为数据源进行绑定
        Repeater1.DataSource = PageDs;
        Repeater1.DataBind();
        
    }

    //显示编辑区域
    private void SetDisplayTrue()
    ...{
        lblCompanyName.Visible = true;
        lblName.Visible = true;
        lblAddress.Visible = true;
        lblCity.Visible = true;
        txtCompanyName.Visible = true;
        txtContactName.Visible = true;
        txtAddress.Visible = true;
        txtCity.Visible = true;
        Panel1.Visible = true;
    }

    //隐藏编辑区域
    private void SetDisplayFalse()
    ...{
        lblCompanyName.Visible = false;
        lblName.Visible = false;
        lblAddress.Visible = false;
        lblCity.Visible = false;
        txtCompanyName.Visible = false;
        txtContactName.Visible = false;
        txtAddress.Visible = false;
        txtCity.Visible = false;
        Panel1.Visible = false;
    }

    private void ClearWord()
    ...{
        txtCompanyName.Text = "";
        txtContactName.Text = "";
        txtAddress.Text = "";
        txtCity.Text = "";
    }
    //封装javascript
    private void ShowMessage(string Message)
    ...{
        Literal TxtMsg = new Literal();
        TxtMsg.Text = "<script>alert('"+Message+"')</script>";
        Page.Controls.Add(TxtMsg);
    }


    //更新数据
    protected void btnUpdate_Click(object sender, EventArgs e)
    ...{
        /**//*在有数据输入的时候应该检查输入数据的合法性，
         * 过滤掉特殊的脚本，特殊的字符串，提高安全性
        */
        string CompanyName = Server.HtmlEncode(txtCompanyName.Text.ToString());
        string ContactName = Server.HtmlEncode(txtContactName.Text.ToString());
        string Address = Server.HtmlEncode(txtAddress.Text.ToString());
        string City = Server.HtmlEncode(txtCity.Text.ToString());
        string UpdateStr = "UPDATE Suppliers SET CompanyName='" + CompanyName + "',ContactName='" + ContactName + "'," +
                 "Address='" + Address + "',City='" + City + "' WHERE SupplierID='" + Session["ID"] + "' ";
        Con = new SqlConnection(ConStr);
        SqlCommand UpdateCmd = new SqlCommand(UpdateStr,Con);
        try
        ...{
            Con.Open();
            UpdateCmd.ExecuteNonQuery();
            ShowMessage("更新成功");
            SetDisplayFalse();
            BindRepeter();
        }
        catch (Exception ex)
        ...{
            ShowMessage("更新出错，请重新输入");
        }
        finally
        ...{
            Con.Dispose();
        }
    }


    protected void Button1_Click(object sender, EventArgs e)
    ...{
        SetDisplayFalse();
    }

    //插入一行新数据
    protected void btnInsert_Click(object sender, EventArgs e)
    ...{
        string CompanyName = Server.HtmlEncode(txtCompanyName.Text.ToString());
        string ContactName = Server.HtmlEncode(txtContactName.Text.ToString());
        string Address = Server.HtmlEncode(txtAddress.Text.ToString());
        string City = Server.HtmlEncode(txtCity.Text.ToString());
        string InsertStr = "INSERT INTO Suppliers (CompanyName,ContactName,Address,City) VALUES('" + CompanyName + "','" + ContactName + "','" + Address + "','" + City + "')";
        Con = new SqlConnection(ConStr);
        SqlCommand InsertCmd = new SqlCommand(InsertStr, Con);
        try
        ...{
            Con.Open();
            InsertCmd.ExecuteNonQuery();
            ShowMessage("插入成功");
            SetDisplayFalse();
            BindRepeter();
        }
        catch (Exception ex)
        ...{
            ShowMessage("插入失败，请重新检查");
        }
        finally
        ...{
            Con.Dispose();
        }
    }

    
    //给删除按钮添加客户端的Confirm对话框
    protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    ...{

        if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
        ...{
            ((Button)Repeater1.Controls[Repeater1.Controls.Count-1].FindControl("Delete")).Attributes["onclick"] = "if(!confirm('你真的要删除这条记录么?'))return   false;";
        }

    }


    //下一页
    protected void btnPage_Click(object sender, EventArgs e)
    ...{
        //更改pageds的当前页数
        lblCount.Text = Convert.ToString(Convert.ToInt32(lblCount.Text) + 1);
        BindRepeter();
    }

    //上一页
    protected void Button2_Click(object sender, EventArgs e)
    ...{
        //更改当前页
        lblCount.Text = Convert.ToString(Convert.ToInt32(lblCount.Text)-1);
        BindRepeter();
    }

    //排序
    protected void btnSort_Click(object sender, EventArgs e)
    ...{
        //判断排序表达式的顺序
        if (ViewState["Direction"].ToString() == "DESC")
        ...{
            ViewState["Direction"] = "ASC";
        }
        else
        ...{
            ViewState["Direction"] = "DESC";
        }
        /**//*设置完排序的顺序以后，将排序后的dataview
         *绑定到repeter上。这个方法，目前有个缺陷，
         * 每次排序的时候都是将整个数据源进行排序，
         * 并不是对当前的分页进行排序。
        */
        BindRepeter();
    }