GridView加入自动求和求平均值小计

17.GridView加入自动求和求平均值小计

效果图：

解决方案：

Code1

    
       1private double sum = 0;//取指定列的数据和，你要根据具体情况对待可能你要处理的是int
 2protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
 3{
 4 if (e.Row.RowIndex >= 0)
 5 {
 6 sum += Convert.ToDouble(e.Row.Cells[6].Text);
 7 }
 8 else if (e.Row.RowType == DataControlRowType.Footer)
 9 {
10 e.Row.Cells[5].Text = "总薪水为：";
11 e.Row.Cells[6].Text = sum.ToString();
12 e.Row.Cells[3].Text = "平均薪水为：";
13 e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString();
14 }
15}

后台代码

    
      1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Web;
 5using System.Web.Security;
 6using System.Web.UI;
 7using System.Web.UI.WebControls;
 8using System.Web.UI.WebControls.WebParts;
 9using System.Web.UI.HtmlControls;
10using System.Data.SqlClient;
11using System.Drawing;
12public partial class Default7 : System.Web.UI.Page
13{
14 SqlConnection sqlcon;
15 SqlCommand sqlcom;
16 string strCon = "Data Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
17 protected void Page_Load(object sender, EventArgs e)
18 {
19 if (!IsPostBack)
20 {
21 bind();
22 }
23 }
24 protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
25 {
26 GridView1.EditIndex = e.NewEditIndex;
27 bind();
28 }
29 protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
30 {
31 sqlcon = new SqlConnection(strCon);
32 string sqlstr = "update 飞狐工作室 set 姓名='"
33 + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim() + "',家庭住址='"
34 + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "' where 身份证号码='"
35 + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
36 sqlcom = new SqlCommand(sqlstr, sqlcon);
37 sqlcon.Open();
38 sqlcom.ExecuteNonQuery();
39 sqlcon.Close();
40 GridView1.EditIndex = -1;
41 bind();
42 }
43 protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
44 {
45 GridView1.EditIndex = -1;
46 bind();
47 }
48 public void bind()
49 {
50 string sqlstr = "select top 5 * from 飞狐工作室";
51 sqlcon = new SqlConnection(strCon);
52 SqlDataAdapter myda = new SqlDataAdapter(sqlstr, sqlcon);
53 DataSet myds = new DataSet();
54 sqlcon.Open();
55 myda.Fill(myds, "飞狐工作室");
56 GridView1.DataSource = myds;
57 GridView1.DataKeyNames = new string[] { "身份证号码" };
58 GridView1.DataBind();
59 sqlcon.Close();
60 }
61 private double sum = 0;//取指定列的数据和
62 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
63 {
64 if (e.Row.RowIndex >= 0)
65 {
66 sum += Convert.ToDouble(e.Row.Cells[6].Text);
67 }
68 else if (e.Row.RowType == DataControlRowType.Footer)
69 {
70 e.Row.Cells[5].Text = "总薪水为：";
71 e.Row.Cells[6].Text = sum.ToString();
72 e.Row.Cells[3].Text = "平均薪水为：";
73 e.Row.Cells[4].Text = ((int)(sum / GridView1.Rows.Count)).ToString();
74 }
75 }
76}

前台：唯一的花头就是设置ShowFooter="True" ，否则默认表头为隐藏的！

前台代码

    
       1<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="3" OnRowEditing="GridView1_RowEditing"
 2 OnRowUpdating="GridView1_RowUpdating" OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px" OnRowDataBound="GridView1_RowDataBound" ShowFooter="True" >
 3 <FooterStyle BackColor="White" ForeColor="#000066" />
 4 <Columns>
 5 <asp:CommandField HeaderText="编辑" ShowEditButton="True" />
 6 <asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True" />
 7 <asp:BoundField DataField="姓名" HeaderText="姓名" />
 8 <asp:BoundField DataField="出生日期" HeaderText="邮政编码" />
 9 <asp:BoundField DataField="家庭住址" HeaderText="家庭住址" />
10 <asp:BoundField DataField="邮政编码" HeaderText="邮政编码" />
11 <asp:BoundField DataField="起薪" HeaderText="起薪" />
12 
13 </Columns>
14 <RowStyle ForeColor="#000066" />
15 <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
16 <PagerStyle BackColor="White" ForeColor="#000066" HorizontalAlign="Left" CssClass="ms-formlabel DataGridFixedHeader"/>
17 <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
18</asp:GridView>