ASP.net gridview之性别

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using MySql.Data.MySqlClient;

public partial class GridView_分页_ : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ViewState["SortOrder"] = "stu_id";
            ViewState["OrderDire"] = "ASC";

            Bind();
        }
    }
    public void Bind()
    {
        DropDownList ddl;
        string sqlstr = "select * from t_student";
        DataSet myds = DBHelper.SqlHelper.ExecuteDataSetText(sqlstr);
        DataView view = myds.Tables[0].DefaultView;
        string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"];
        view.Sort=sort;
        GridView1.DataSource=view;

        ////GridView1.DataSource = myds;
        GridView1.DataKeyNames = new string[] { "stu_id" };//主键
        GridView1.DataBind();

        for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        {

            //当前页从那条开始
            int page = GridView1.PageIndex;
            int size=GridView1.PageSize;
            int pageCount = page * size;
            DataRowView mydrv = myds.Tables[0].DefaultView[pageCount+i];
            if (Convert.ToString(mydrv["stu_sex"]).Trim() == "1")
            {
                ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");
                ddl.SelectedIndex = 0;
            }
            if (Convert.ToString(mydrv["stu_sex"]).Trim() == "0")
            {
                ddl = (DropDownList)GridView1.Rows[i].FindControl("DropDownList1");
                ddl.SelectedIndex = 1;
            }
        }
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        Bind();
    }
    protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
    {
        string sPage = e.SortExpression;
        if (ViewState["SortOrder"].ToString() == sPage)
        {
            if (ViewState["OrderDire"].ToString() == "Desc")
                ViewState["OrderDire"] = "ASC";
            else
                ViewState["OrderDire"] = "Desc";
        }
        else
        {
            ViewState["SortOrder"] = e.SortExpression;
        }
        Bind();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;//把那一行设为编辑状态
        Bind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        Bind();
    }
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        string sqlstr = "update t_student set stu_code='"
            + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim() + "',stu_name='"
             + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[3].Controls[0])).Text.ToString().Trim() + "',stu_sex='"
              + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[4].Controls[0])).Text.ToString().Trim() + "',age='"
               + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[5].Controls[0])).Text.ToString().Trim() + "',stu_dept='"
                + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[6].Controls[0])).Text.ToString().Trim() + "',stu_admin='"
                 + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[7].Controls[0])).Text.ToString().Trim() + "',stu_provinces='"
                  + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[8].Controls[0])).Text.ToString().Trim() + "',stu_city='"
                   + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[9].Controls[0])).Text.ToString().Trim() + "',stu_districts='"
                    + ((TextBox)(GridView1.Rows[e.RowIndex].Cells[10].Controls[0])).Text.ToString().Trim() + "' where stu_id='"
                     + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        DBHelper.SqlHelper.ExecteNonQueryText(sqlstr);
        GridView1.EditIndex = -1;
        Bind();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string sqlstr = "delete from t_student where stu_id='"+ GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
        DBHelper.SqlHelper.ExecteNonQueryText(sqlstr);
        Response.Write("<script>alert('删除成功')</script>");
        GridView1.EditIndex = -1;
        Bind();
    }
    protected void CheckBox3_CheckedChanged(object sender, EventArgs e)
    {
        for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        {
            CheckBox CheckBox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox2");
            if (CheckBox3.Checked == true)
            {
                CheckBox.Checked = true;
            }
            else
            {
                CheckBox.Checked = false;
            }
        }
        CheckBox4.Checked = false;
    }
    protected void CheckBox4_CheckedChanged(object sender, EventArgs e)
    {
        for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
        {
            CheckBox CheckBox = (CheckBox)GridView1.Rows[i].FindControl("CheckBox2");
            if (CheckBox4.Checked == false)
            {
                CheckBox.Checked = true;
            }
            else
            {
                CheckBox.Checked = false;
            }
        }
        CheckBox3.Checked = false;
    }
    protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
    {

    }
    protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
    {
        GridView1.SelectedIndex = e.NewSelectedIndex;
        int index = e.NewSelectedIndex;
        string key = GridView1.DataKeys[index].Value.ToString();
        CheckBox check = (CheckBox)GridView1.Rows[index].FindControl("CheckBox2");
        check.Checked = true;
    }

    public MySqlDataReader ddbind() {

        string sql = " select distinct stu_sex,case(stu_sex) when 1 then '男' else '女'  end as stu_sex_ch from t_student";
        return DBHelper.SqlHelper.ExecuteReaderText(sql, null);
    }
}

　　

　　

<asp:DropDownList ID="DropDownList1" runat="server"
DataValueField="stu_sex" Height="19px" Width="67px" DataTextField="stu_sex_ch" DataSource="<%#ddbind() %>">

</asp:DropDownList>