学习笔记51（含有dropdownlist的gridview增删改查）

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GridView控件修改、删除例子，修改时含有DropDownList控件。
示例运行效果图：

GridViewUp.aspx文件代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewUp.aspx.cs" Inherits="gridview_GridViewUp" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <table cellpadding="0" cellspacing="0" border="0" width="80%" style="font-size: 11px">
                <tr>
                    <td align="center">
                        <asp:GridView ID="GridView1" runat="server" Width="100%" CellPadding="4" ForeColor="#333333"
                            AutoGenerateColumns="False" AllowPaging="True" PageSize="12" OnRowCancelingEdit="GridView1_RowCancelingEdit"
                            OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnRowDeleting="GridView1_RowDeleting"
                            DataKeyNames="id,name" OnPageIndexChanging="GridView1_PageIndexChanging" DataMember="card,price" OnRowDataBound="GridView1_RowDataBound" GridLines="None">
                            <Columns>
                                <asp:BoundField HeaderText="身份证号" DataField="card" Visible=false />
                                <asp:BoundField HeaderText="编号" DataField="id" ReadOnly="True" />
                                <asp:BoundField DataField="name" HeaderText="姓名" ReadOnly="True" />
                                <asp:TemplateField HeaderText="身份证号">
                                    <ItemTemplate>
                                        <%# Eval("card") %>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:TextBox ID="TBCard" Text='<%# Eval("card") %>' runat="server" Width="140px" />
                                    </EditItemTemplate>
                                    <ItemStyle Width="150px" />
                                </asp:TemplateField>
                                <asp:TemplateField HeaderText="学历">
                                    <ItemTemplate>
                                        <%# Eval("description")%>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:HiddenField ID="HDFXueli" runat="server" Value='<%# Eval("xueli") %>' />
                                        <asp:DropDownList ID="DDLXueli" runat="server" Width="90px" />
                                    </EditItemTemplate>
                                    <ItemStyle Width="100px" />
                                </asp:TemplateField>
                                <asp:TemplateField HeaderText="价格">
                                    <ItemTemplate>
                                        <%# Eval("price") %>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:TextBox ID="TBPrice" Text='<%# Eval("price") %>' runat="server" Width="90px" />
                                    </EditItemTemplate>
                                    <ItemStyle Width="100px" />
                                </asp:TemplateField>
                                <asp:BoundField HeaderText="建立时间" DataField="createdate" ReadOnly="True" />
                                <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" HeaderText="操作" />
                            </Columns>
                            <PagerSettings FirstPageText="" LastPageText="" NextPageText="" PreviousPageText="" />
                            <RowStyle Height="20px" BackColor="#F7F6F3" ForeColor="#333333" />
                            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                            <EditRowStyle BackColor="#999999" />
                            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
                            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
                        </asp:GridView>
                    </td>
                </tr>
            </table>
        </div>
    </form>
</body>
</html>

GridViewUp.aspx.cs文件代码：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
using System.Data.SqlClient;

public partial class gridview_GridViewUp : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            GridViewBind();
        }
    }

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridViewBind();
    }

private void GridViewBind()
    {
        string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
        string SqlStr = "SELECT a.*,b.description FROM test01 a,xueli b where a.xueli=b.code and a.id<1000 and a.id>200";
        DataSet ds = new DataSet();

try
        {
            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
            da.Fill(ds, "test01");
            if (conn.State.ToString() == "Open") conn.Close();

GridView1.DataSource = ds.Tables[0].DefaultView;
            GridView1.DataBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (((DropDownList)e.Row.FindControl("DDLXueli")) != null)
        {        
            DropDownList ddlxueli = (DropDownList)e.Row.FindControl("DDLXueli");

// 生成 DropDownList 的值，绑定数据
            string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
            string SqlStr = "SELECT * from xueli";
            DataSet ds = new DataSet();

SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
            da.Fill(ds, "xueli");
            if (conn.State.ToString() == "Open") conn.Close();

ddlxueli.DataSource = ds.Tables[0].DefaultView;
            ddlxueli.DataTextField = "description";
            ddlxueli.DataValueField = "code";
            ddlxueli.DataBind();
            //

// 选中 DropDownList
            ddlxueli.SelectedValue = ((HiddenField)e.Row.FindControl("HDFXueli")).Value;
            //
        }
    }

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        GridViewBind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        GridViewBind();
    }

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
        string card = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBCard")).Text;
        string xueli = ((DropDownList)GridView1.Rows[e.RowIndex].FindControl("DDLXueli")).SelectedValue;
        string price = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TBPrice")).Text;

string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
        string SqlStr = "update test01 set card='" + card + "',xueli='" + xueli + "',price='" + price + "' where id=" + id;

try
        {
            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlCommand comm = new SqlCommand(SqlStr, conn);
            comm.ExecuteNonQuery();
            comm.Dispose();
            if (conn.State.ToString() == "Open") conn.Close();

GridView1.EditIndex = -1;
            GridViewBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();
        string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
        string SqlStr = "delete from test01 where id=" + id;

GridView1.EditIndex = -1;
            GridViewBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }
}

sql server生成表代码：

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