Selectuaer.aspx.cs

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using System;
using System.Data;
using System.Data.SqlClient;
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.Linq;
public partial class Selectuaer : System.Web.UI.Page
{   
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            bindData();
        }
    }
    private void bindData()
    {
        string st="select UID,UPower,UName,UAddress,UTel,UEmail,UDep from Users";   
        SqlConnection con = WMS.createCon();
        con.Open();
        SqlDataAdapter da = new SqlDataAdapter(st, con);
        DataSet ds = new DataSet();
        da.Fill(ds);
        con.Close();
        GridView1.DataSource = ds.Tables[0].DefaultView;
        GridView1.DataBind();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
       
        string s = "select UID,UPower,UName,UAddress,UTel,UEmail,UDep from Users  where UID ='" + TextBox1.Text + "'";
        SqlConnection con = WMS.createCon();
        con.Open();
        SqlDataAdapter da = new SqlDataAdapter(s, con);
        DataSet ds = new DataSet();
        da.Fill(ds);
        con.Close();
        GridView1.DataSource = ds.Tables[0].DefaultView;
        GridView1.DataBind();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        bindData();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        SqlConnection con = WMS.createCon();
        con.Open();
        SqlCommand comm = new SqlCommand("delete from Users where UID='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'", con);
        try
        {
            int i = Convert.ToInt32(comm.ExecuteNonQuery());
            if (i > 0)