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                <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" OnPageIndexChanging="GridView1_PageIndexChanging"  OnRowDataBound="GridView1_RowDataBound" GridLines="None">
                            <Columns>
                                <asp:TemplateField HeaderText="登录名">
                                    <EditItemTemplate>
                                        <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("admin") %>'></asp:TextBox>
                                    </EditItemTemplate>
                                    <ItemTemplate>
                                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("admin") %>'></asp:Label>
                                    </ItemTemplate>
                                </asp:TemplateField>
                                <asp:TemplateField HeaderText="密码">
                                    <ItemTemplate>
                                        <%# Eval("UserPassword")%>
                                    </ItemTemplate>
                                    <EditItemTemplate>
                                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("UserPassword") %>'></asp:TextBox>&nbsp;
                                    </EditItemTemplate>
                                    <ItemStyle Width="100px" />
                                </asp:TemplateField>
                                <asp:BoundField HeaderText="最后登录时间" DataField="logintime" 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>

SqlConnection conn = null;
    string connstr = System.Configuration.ConfigurationManager.AppSettings["Connstring"];//在Config中自己搞，不会的看书
    protected void Page_Load(object sender, EventArgs e)
    {
        
        if (!IsPostBack)//这句不会，去S吧
        {
            GridViewBind();//做了一个绑定数据的方法.
        }
         
    }
    private void GridViewBind()
    {
         
   
        string SqlStr = "Select * FROM admin";
        DataSet ds = new DataSet();

        try
        {
            conn = new SqlConnection(connstr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
            da.Fill(ds, "AdminInfo");
            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_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;//获取当前行
        GridViewBind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;//取消更新
        GridViewBind();
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridViewBind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        string id = GridView1.DataKeys[e.RowIndex].Values[0].ToString();//获取当前行ID
        string admin = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("TextBox2")).Text;//强奸转化

        string SqlStr = "update admin set admin='" + admin + "'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)
    {
       //我不想写了...因为剩下的都...
        //类似更新操作，改一下SQL语句就可以了
    }