GridView加入自动求和求平均值小计

GridView加入自动求和求平均值小计

效果图：
解决方案：   
private 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
protected void
GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
   
{
       
        if (e.Row.RowIndex >= 0)
        {
           
sum += Convert.ToDouble(e.Row.Cells[6].Text);
        }
        else if
(e.Row.RowType == DataControlRowType.Footer)
        {
           
e.Row.Cells[5].Text = "总薪水为：";
            e.Row.Cells[6].Text =
sum.ToString();
            e.Row.Cells[3].Text = "平均薪水为：";
           
e.Row.Cells[4].Text = ((int)(sum /
GridView1.Rows.Count)).ToString();
           
        }
   
}

后台全部代码：
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;
using System.Data.SqlClient;
using
System.Drawing;

public partial class Default7 : System.Web.UI.Page
{
    SqlConnection
sqlcon;
    SqlCommand sqlcom;
    string strCon = "Data
Source=(local);Database=北风贸易;Uid=sa;Pwd=sa";
    protected void
Page_Load(object sender, EventArgs e)
    {
        if
(!IsPostBack)
        {
            bind();

        }
    }
    protected void GridView1_RowEditing(object sender,
GridViewEditEventArgs e)
    {
        GridView1.EditIndex =
e.NewEditIndex;
        bind();
    }
    protected void
GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
   
{
        sqlcon = new SqlConnection(strCon);
        string sqlstr =
"update 飞狐工作室 set 姓名='"
            +
((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim()
+ "',家庭住址='"
            +
((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim()
+ "' where 身份证号码='"
            +
GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        sqlcom = new
SqlCommand(sqlstr, sqlcon);
        sqlcon.Open();
       
sqlcom.ExecuteNonQuery();
        sqlcon.Close();
       
GridView1.EditIndex = -1;
        bind();
    }
    protected void
GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
   
{
        GridView1.EditIndex = -1;
        bind();
    }
    public
void bind()
    {
        string sqlstr = "select top 5 * from
飞狐工作室";
        sqlcon = new SqlConnection(strCon);
        SqlDataAdapter
myda = new SqlDataAdapter(sqlstr, sqlcon);
        DataSet myds = new
DataSet();
        sqlcon.Open();
        myda.Fill(myds,
"飞狐工作室");
        GridView1.DataSource = myds;
       
GridView1.DataKeyNames = new string[] { "身份证号码" };
       
GridView1.DataBind();
        sqlcon.Close();
    }
    private double
sum = 0;//取指定列的数据和
    protected void GridView1_RowDataBound(object sender,
GridViewRowEventArgs e)
    {
       
        if (e.Row.RowIndex >=
0)
        {
            sum +=
Convert.ToDouble(e.Row.Cells[6].Text);
        }
        else if
(e.Row.RowType == DataControlRowType.Footer)
        {
           
e.Row.Cells[5].Text = "总薪水为：";
            e.Row.Cells[6].Text =
sum.ToString();
            e.Row.Cells[3].Text = "平均薪水为：";
           
e.Row.Cells[4].Text = ((int)(sum /
GridView1.Rows.Count)).ToString();
           
        }
   
}
}
前台：唯一的花头就是设置ShowFooter="True"
，否则默认表头为隐藏的！
<asp:GridView ID="GridView1"
runat="server"    AutoGenerateColumns="False" CellPadding="3"
OnRowEditing="GridView1_RowEditing"
                       
OnRowUpdating="GridView1_RowUpdating"
OnRowCancelingEdit="GridView1_RowCancelingEdit" BackColor="White"
BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" Font-Size="12px"
OnRowDataBound="GridView1_RowDataBound" ShowFooter="True"
>
                        <FooterStyle BackColor="White"
ForeColor="#000066" />
                       
<Columns>
                            <asp:CommandField
HeaderText="编辑" ShowEditButton="True" />
                           
<asp:BoundField DataField="身份证号码" HeaderText="编号" ReadOnly="True"
/>
                            <asp:BoundField DataField="姓名"
HeaderText="姓名" />
                            <asp:BoundField
DataField="出生日期" HeaderText="邮政编码" />
                           
<asp:BoundField DataField="家庭住址" HeaderText="家庭住址"
/>
                            <asp:BoundField DataField="邮政编码"
HeaderText="邮政编码" />
                            <asp:BoundField
DataField="起薪" HeaderText="起薪" />
                          

                        </Columns>
                       
<RowStyle ForeColor="#000066" />
                       
<SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White"
/>
                        <PagerStyle BackColor="White"
ForeColor="#000066" HorizontalAlign="Left" CssClass="ms-formlabel
DataGridFixedHeader"/>
                        <HeaderStyle
BackColor="#006699" Font-Bold="True" ForeColor="White"
/>
                    </asp:GridView>