adminzhuanyefind.aspx.cs

学生寝室管理系统

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
public partial class adminzhuanyefind : System.Web.UI.Page
{
    SqlCommand cmd, cmd1;
    SqlConnection cn;
    SqlDataReader dr;
    SqlDataAdapter da, da1;
    DataSet ds = new DataSet();
    DataSet ds1 = new DataSet();
    string strsql1, strsql2, strsql;
    protected void Page_Load(object sender, EventArgs e)
    {

        if (!this.IsPostBack)
        {
            if (Session["adminname"] == null)
            {
                Response.Redirect("index.aspx");
            }
            else
            {
                cn = sqldata.createcon();
                cn.Open();
                strsql = "select zhuanye from zhuanye ";
                cmd = new SqlCommand(strsql, cn);
                dr = cmd.ExecuteReader();
                this.DropDownList1.DataSource = dr;
                this.DropDownList1.DataTextField = "zhuanye";
                this.DropDownList1.DataBind();
                this.DropDownList1.Items.Add("所有专业名称");
                this.DropDownList1.SelectedIndex = this.DropDownList1.Items.Count - 1;
                dr.Close();
                cn = sqldata.createcon();
                cn.Open();
                strsql1 = "select * from users ";
                da = new SqlDataAdapter(strsql1, cn);
                da.Fill(ds1);
                this.mydatagrid3.DataKeyField = "userid";
                this.mydatagrid3.DataSource = ds1.Tables[(0)].DefaultView;
                this.mydatagrid3.DataBind();
                cn.Close();
            }
        }
    }
    protected void mydatagrid3_ItemDataBound(object sender, DataGridItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
        {
            e.Item.Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#d3d3d3'");
            e.Item.Attributes.Add("onmouseout", "this.style.backgroundColor=c");
            ((LinkButton)(e.Item.Cells[16].Controls[0])).Attributes.Add("onclick", "return confirm('您确认要删除吗?');");
        }
    }
    protected void mydatagrid3_PageIndexChanged(object source, DataGridPageChangedEventArgs e)
    {
        this.mydatagrid3.CurrentPageIndex =e.NewPageIndex ;
        string userzhuanye = this.DropDownList1.SelectedItem.Value.ToString();
        cn = sqldata.createcon();
        cn.Open();
        strsql1 = "select * from users ";
        da = new SqlDataAdapter(strsql1, cn);
        da.Fill(ds1);
        if (userzhuanye == "所有专业名称")
        {
            this.mydatagrid3.DataSource = ds1.Tables[(0)].DefaultView;

        }
        else
        {
            DataView ximingds = new DataView(ds1.Tables[0]);
            ximingds.RowFilter = "userzhuanye='" + userzhuanye + "'";
            this.mydatagrid3.DataSource = ximingds;
          
        }
        this.mydatagrid3.DataBind();
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        this.mydatagrid3.CurrentPageIndex =0;
        string userzhuanye = this.DropDownList1.SelectedItem.Value.ToString();
        cn = sqldata.createcon();
        cn.Open();
        strsql1 = "select * from users ";
        da = new SqlDataAdapter(strsql1, cn);
        da.Fill(ds1);
        if (userzhuanye == "所有专业名称")
        {
            this.mydatagrid3.DataSource = ds1.Tables[(0)].DefaultView;

        }
        else
        {
            DataView ximingds = new DataView(ds1.Tables[0]);
            ximingds.RowFilter = "userzhuanye='" + userzhuanye + "'";
            this.mydatagrid3.DataSource = ximingds;

        }
        this.mydatagrid3.DataBind();
    }
    protected void mydatagrid3_DeleteCommand(object source, DataGridCommandEventArgs e)
    {
        int id = Convert.ToInt32(this.mydatagrid3.DataKeys[e.Item.ItemIndex].ToString());
        cn = sqldata.createcon();
        cn.Open();
        strsql1 = "delete from users where userid='" + id + "'";
        cmd1 = new SqlCommand(strsql1, cn);
        cmd1.ExecuteNonQuery();
        this.mydatagrid3 .DataBind ();
        this.labmessage.Text = "删除成功";
        this.HyperLink1.Visible = true;
    }
}