关于ADO.NET的一道考试题
2009-11-28 21:33
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一、数据库
提供数据库db_Shop，其中有两张表：一是商品类别表T_GoodsType；二是商品信息表T_GoodsInfo,两张表的结构为：
T_GoodsType：
T_ GoodsInfo：
二、需要实现的功能
1、 添加商品（15分）
2、 使用GridView显示所有商品列表（15分）
3、 可以按商品类别显示商品列表（15分）
4、 修改商品单价（15分）
5、 删除一件商品（10分）
三、考试要求：
1、 对页面样式无要求；
2、 封装数据库访问类（10分）
3、 其中【修改商品单价】要求使用存储过程实现；（10分）
4、 良好的编码规范，包括：命名、注释等；（10分）
四、功能截图
显示所有商品：
[b]
前台代码：
<body>
<form id="form1" runat="server">
<div>
<span style="color: Blue; font-size:x-large">显示所有商品：</span><br />
商品类别：<asp:DropDownList ID="ddl_GoodsType" runat="server">
</asp:DropDownList>
<asp:Button ID="bt_search" runat="server" Text="搜索" onclick="bt_search_Click" />
<asp:GridView ID="gv_GoodsInfo" runat="server" AutoGenerateColumns="false"
DataKeyNames="GoodsID" onrowcancelingedit="gv_GoodsInfo_RowCancelingEdit"
onrowcommand="gv_GoodsInfo_RowCommand" onrowediting="gv_GoodsInfo_RowEditing"
onrowupdating="gv_GoodsInfo_RowUpdating">
<Columns>
<asp:BoundField DataField="TypeName" HeaderText="商品类别" ReadOnly="true"/>
<asp:BoundField DataField="GoodsName" HeaderText="商品名称" ReadOnly="true"/>
<asp:BoundField DataField="GoodsPrice" HeaderText="商品价格" />
<asp:CommandField ShowEditButton="True" HeaderText="编辑" />
<asp:TemplateField HeaderText="删除">
<ItemTemplate>
<asp:Button ID="Button1" runat="server" Text="删除" CommandName="Del" CommandArgument='<%#Eval("GoodsID") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
添加商品页面前台：
<body>
<form id="form1" runat="server">
<div style="background-color:ActiveBorder">
<span style="color:Blue; font-size:x-large">添加商品：</span><br />
商品类别：<asp:DropDownList ID="ddl_GoodsType" runat="server">
</asp:DropDownList><br />
商品名称：<asp:TextBox ID="tb_goodsname" runat="server"></asp:TextBox><br />
商品价格：<asp:TextBox ID="tb_goodsprice" runat="server"></asp:TextBox><br />
<asp:Button ID="bt_Add" runat="server" Text="添加" onclick="bt_Add_Click" />
</div>
</form>
<p>
</p>
</body>
后台代码：
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
SqlHelper helper = new SqlHelper();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bind();
bindlist();
}
}
/// <summary>
/// 将商品类别绑定下拉菜单
/// </summary>
protected void bind()
{
string str = "select * from T_GoodsType";
DataTable dt = null;
dt = helper.ExecuteReturnTable(str, null, CommandType.Text);
ListItem item = new ListItem("全部类型", "0");
ddl_GoodsType.Items.Insert(0, item);
ddl_GoodsType.DataSource = dt;
ddl_GoodsType.DataTextField = "TypeName";
ddl_GoodsType.DataValueField = "TypeID";
ddl_GoodsType.DataBind();
}
/// <summary>
/// 根据商品类别绑定数据
/// </summary>
protected void bindlist()
{
int TypeID = int.Parse(ddl_GoodsType.SelectedValue);
string str = "select * from T_GoodsInfo,T_GoodsType where T_GoodsInfo.TypeID=T_GoodsType.TypeID";
if (TypeID != 0)
{
str += " and T_GoodsType.TypeID=" + TypeID;
}
DataTable dt = helper.ExecuteReturnTable(str, null, CommandType.Text);
gv_GoodsInfo.DataSource = dt;
gv_GoodsInfo.DataBind();
}
/// <summary>
/// 按商品类别进行搜索
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void bt_search_Click(object sender, EventArgs e)
{
bindlist();
}
/// <summary>
/// 删除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Del")
{
int GoodsID = int.Parse(e.CommandArgument.ToString());
string str = "delete from T_GoodsInfo where GoodsID=" + GoodsID;
int result = -1;
result = helper.ExecuteReturnInt(str,null,CommandType.Text);
if (result > 0)
{
Response.Write("<script>alert('删除成功')</script>");
}
else
{
Response.Write("<script>alert('删除失败')</script>");
}
bindlist();
}
}
/// <summary>
/// 更新
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//string str = "update T_GoodsInfo set GoodsPrice=@GoodsPrice where GoodsID=@GoodsID";
//使用存储过程
string str = "proc_changeprice";
//存储过程的参数
SqlParameter[] para = {
new SqlParameter("@GoodsPrice",SqlDbType.Float),
new SqlParameter("@GoodsID",SqlDbType.Int)
};
para[0].Value=((TextBox)(gv_GoodsInfo.Rows[e.RowIndex].Cells[2].Controls[0])).Text;
para[1].Value = int.Parse(gv_GoodsInfo.DataKeys[e.RowIndex].Value.ToString());
int result = -1;
result = helper.ExecuteReturnInt(str, para, CommandType.StoredProcedure);
if (result > 0)
{
Response.Write("<script>alert('更新成功')</script>");
}
else
{
Response.Write("<script>alert('更新失败')</script>");
}
bindlist();
}
/// <summary>
/// 取消编辑
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
gv_GoodsInfo.EditIndex = -1;
bindlist();
}
/// <summary>
/// 编辑
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowEditing(object sender, GridViewEditEventArgs e)
{
gv_GoodsInfo.EditIndex = e.NewEditIndex;
bindlist();
}
}
添加页面的后台：
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class AddGoods : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bind();
}
}
/// <summary>
/// 将商品类别绑定下拉菜单
/// </summary>
protected void bind()
{
string str = "select * from T_GoodsType";
SqlHelper helper = new SqlHelper();
DataTable dt = null;
dt = helper.ExecuteReturnTable(str, null, CommandType.Text);
ListItem item = new ListItem("全部类型", "0");
ddl_GoodsType.Items.Insert(0, item);
ddl_GoodsType.DataSource = dt;
ddl_GoodsType.DataTextField = "TypeName";
ddl_GoodsType.DataValueField = "TypeID";
ddl_GoodsType.DataBind();
}
protected void bt_Add_Click(object sender, EventArgs e)
{
string name = tb_goodsname.Text.Trim();
string price = tb_goodsprice.Text.Trim();
string str = "insert into T_GoodsInfo(TypeID,GoodsName,GoodsPrice) values(@TypeID,@GoodsName,@GoodsPrice)";
SqlParameter[] para = {
new SqlParameter("@TypeID",SqlDbType.NVarChar),
new SqlParameter("@GoodsName",SqlDbType.VarChar),
new SqlParameter("@GoodsPrice",SqlDbType.Float)};
para[0].Value = int.Parse(ddl_GoodsType.SelectedValue);
para[1].Value = name;
para[2].Value = price;
SqlHelper helper = new SqlHelper();
int result = helper.ExecuteReturnInt(str,para,CommandType.Text);
if (result > 0)
{
Response.Write("<script>alert('添加成功');</script>");
}
else
{
Response.Write("<script>alert('添加失败');</script>");
}
}
}
[/b]
提供数据库db_Shop，其中有两张表：一是商品类别表T_GoodsType；二是商品信息表T_GoodsInfo,两张表的结构为：
T_GoodsType：
| 字段名称 | 类型 | 备注 |
| TypeID | Int | 主键，类别id |
| TypeName | Varchar（50） | 类别名称 |
| 字段名称 | 类型 | 备注 |
| GoodsID | Int | 主键，商品id |
| TypeID | Int | 商品类别id |
| GoodsName | Varchar（50） | 商品名称 |
| GoodsPrice | Float | 商品价格 |
1、 添加商品（15分）
2、 使用GridView显示所有商品列表（15分）
3、 可以按商品类别显示商品列表（15分）
4、 修改商品单价（15分）
5、 删除一件商品（10分）
三、考试要求：
1、 对页面样式无要求；
2、 封装数据库访问类（10分）
3、 其中【修改商品单价】要求使用存储过程实现；（10分）
4、 良好的编码规范，包括：命名、注释等；（10分）
四、功能截图
显示所有商品：
[b]
前台代码：
<body>
<form id="form1" runat="server">
<div>
<span style="color: Blue; font-size:x-large">显示所有商品：</span><br />
商品类别：<asp:DropDownList ID="ddl_GoodsType" runat="server">
</asp:DropDownList>
<asp:Button ID="bt_search" runat="server" Text="搜索" onclick="bt_search_Click" />
<asp:GridView ID="gv_GoodsInfo" runat="server" AutoGenerateColumns="false"
DataKeyNames="GoodsID" onrowcancelingedit="gv_GoodsInfo_RowCancelingEdit"
onrowcommand="gv_GoodsInfo_RowCommand" onrowediting="gv_GoodsInfo_RowEditing"
onrowupdating="gv_GoodsInfo_RowUpdating">
<Columns>
<asp:BoundField DataField="TypeName" HeaderText="商品类别" ReadOnly="true"/>
<asp:BoundField DataField="GoodsName" HeaderText="商品名称" ReadOnly="true"/>
<asp:BoundField DataField="GoodsPrice" HeaderText="商品价格" />
<asp:CommandField ShowEditButton="True" HeaderText="编辑" />
<asp:TemplateField HeaderText="删除">
<ItemTemplate>
<asp:Button ID="Button1" runat="server" Text="删除" CommandName="Del" CommandArgument='<%#Eval("GoodsID") %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
添加商品页面前台：
<body>
<form id="form1" runat="server">
<div style="background-color:ActiveBorder">
<span style="color:Blue; font-size:x-large">添加商品：</span><br />
商品类别：<asp:DropDownList ID="ddl_GoodsType" runat="server">
</asp:DropDownList><br />
商品名称：<asp:TextBox ID="tb_goodsname" runat="server"></asp:TextBox><br />
商品价格：<asp:TextBox ID="tb_goodsprice" runat="server"></asp:TextBox><br />
<asp:Button ID="bt_Add" runat="server" Text="添加" onclick="bt_Add_Click" />
</div>
</form>
<p>
</p>
</body>
后台代码：
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
SqlHelper helper = new SqlHelper();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bind();
bindlist();
}
}
/// <summary>
/// 将商品类别绑定下拉菜单
/// </summary>
protected void bind()
{
string str = "select * from T_GoodsType";
DataTable dt = null;
dt = helper.ExecuteReturnTable(str, null, CommandType.Text);
ListItem item = new ListItem("全部类型", "0");
ddl_GoodsType.Items.Insert(0, item);
ddl_GoodsType.DataSource = dt;
ddl_GoodsType.DataTextField = "TypeName";
ddl_GoodsType.DataValueField = "TypeID";
ddl_GoodsType.DataBind();
}
/// <summary>
/// 根据商品类别绑定数据
/// </summary>
protected void bindlist()
{
int TypeID = int.Parse(ddl_GoodsType.SelectedValue);
string str = "select * from T_GoodsInfo,T_GoodsType where T_GoodsInfo.TypeID=T_GoodsType.TypeID";
if (TypeID != 0)
{
str += " and T_GoodsType.TypeID=" + TypeID;
}
DataTable dt = helper.ExecuteReturnTable(str, null, CommandType.Text);
gv_GoodsInfo.DataSource = dt;
gv_GoodsInfo.DataBind();
}
/// <summary>
/// 按商品类别进行搜索
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void bt_search_Click(object sender, EventArgs e)
{
bindlist();
}
/// <summary>
/// 删除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Del")
{
int GoodsID = int.Parse(e.CommandArgument.ToString());
string str = "delete from T_GoodsInfo where GoodsID=" + GoodsID;
int result = -1;
result = helper.ExecuteReturnInt(str,null,CommandType.Text);
if (result > 0)
{
Response.Write("<script>alert('删除成功')</script>");
}
else
{
Response.Write("<script>alert('删除失败')</script>");
}
bindlist();
}
}
/// <summary>
/// 更新
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//string str = "update T_GoodsInfo set GoodsPrice=@GoodsPrice where GoodsID=@GoodsID";
//使用存储过程
string str = "proc_changeprice";
//存储过程的参数
SqlParameter[] para = {
new SqlParameter("@GoodsPrice",SqlDbType.Float),
new SqlParameter("@GoodsID",SqlDbType.Int)
};
para[0].Value=((TextBox)(gv_GoodsInfo.Rows[e.RowIndex].Cells[2].Controls[0])).Text;
para[1].Value = int.Parse(gv_GoodsInfo.DataKeys[e.RowIndex].Value.ToString());
int result = -1;
result = helper.ExecuteReturnInt(str, para, CommandType.StoredProcedure);
if (result > 0)
{
Response.Write("<script>alert('更新成功')</script>");
}
else
{
Response.Write("<script>alert('更新失败')</script>");
}
bindlist();
}
/// <summary>
/// 取消编辑
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
gv_GoodsInfo.EditIndex = -1;
bindlist();
}
/// <summary>
/// 编辑
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void gv_GoodsInfo_RowEditing(object sender, GridViewEditEventArgs e)
{
gv_GoodsInfo.EditIndex = e.NewEditIndex;
bindlist();
}
}
添加页面的后台：
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class AddGoods : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bind();
}
}
/// <summary>
/// 将商品类别绑定下拉菜单
/// </summary>
protected void bind()
{
string str = "select * from T_GoodsType";
SqlHelper helper = new SqlHelper();
DataTable dt = null;
dt = helper.ExecuteReturnTable(str, null, CommandType.Text);
ListItem item = new ListItem("全部类型", "0");
ddl_GoodsType.Items.Insert(0, item);
ddl_GoodsType.DataSource = dt;
ddl_GoodsType.DataTextField = "TypeName";
ddl_GoodsType.DataValueField = "TypeID";
ddl_GoodsType.DataBind();
}
protected void bt_Add_Click(object sender, EventArgs e)
{
string name = tb_goodsname.Text.Trim();
string price = tb_goodsprice.Text.Trim();
string str = "insert into T_GoodsInfo(TypeID,GoodsName,GoodsPrice) values(@TypeID,@GoodsName,@GoodsPrice)";
SqlParameter[] para = {
new SqlParameter("@TypeID",SqlDbType.NVarChar),
new SqlParameter("@GoodsName",SqlDbType.VarChar),
new SqlParameter("@GoodsPrice",SqlDbType.Float)};
para[0].Value = int.Parse(ddl_GoodsType.SelectedValue);
para[1].Value = name;
para[2].Value = price;
SqlHelper helper = new SqlHelper();
int result = helper.ExecuteReturnInt(str,para,CommandType.Text);
if (result > 0)
{
Response.Write("<script>alert('添加成功');</script>");
}
else
{
Response.Write("<script>alert('添加失败');</script>");
}
}
}
[/b]
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