未处理的GridView'Sqldata'激发事件PageIndexChanging。
如何处理？
protected void Sqldata_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
Sqldata.PageIndex = e.NewPageIndex;
Sqldata.DataBind();
}
和
<-asp:GridView ID="Sqldata" runat="server" autoGenerateColumns ="False" ShowFooter ="True" showHeaderWhenEmpty="True" EmptyDataText="Dado Não Encontrado" AllowPaging="True"
Width="1100px" Height="350px" CssClass="auto-style5" Font-Names="Arial" HorizontalAlign="Center" PageSize="20">
完整代码
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net;
using System.ComponentModel;
namespace WebApplication5
{
public partial class Lis_Mov_Admin : System.Web.UI.Page
{
//Connection String, criada pelo web form Configuração. (Caminho do servidor. EX: Data Source = Nome/SQLEXPRESS; Initial Catalog = table; user Id = sa; password = 1234)
string connection = ConfigurationManager.ConnectionStrings["ConString"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
try
{
if (Session["Nome"].ToString() == "SuperAdministrador") //Para poder usar o super-administrador criado em código...
{
Label2.Text = Session["Nome"].ToString();
}
else if (Session["Nome"] != null && Session["Funcao"].ToString() == "1")// Evitar que o utilizador navegue via URL e verificando se o nome está vazio ou funcao diferente da do site
{
Label2.Text = Session["Nome"].ToString();
}
else
{
Response.Redirect("Login.aspx");
Label2.Text = Session["Nome"].ToString();
}
}
catch (Exception)
{
Response.Redirect("Login.aspx");//Se o utilizador arrancar com esta página é rederecionado para a página login (ou então dava erro)
}
if (!IsPostBack)//Verifica se a página foi carregada a primeria vez ou não
{
populateGridView();//Variavél Criada do tipo void
}
}
public void populateGridView()
{
DataTable dtbl = new DataTable();
using (SqlConnection sqlCon = new SqlConnection(connection))
{
sqlCon.Open();
SqlDataAdapter sqlDa = new SqlDataAdapter("SELECT * FROM Movimentos", sqlCon);//Mostra os dados inseridos na tabela referida
sqlDa.Fill(dtbl);
}
if (dtbl.Rows.Count > 0)
{
Sqldata.DataSource = dtbl;
Sqldata.DataBind();
}
else
{
dtbl.Rows.Add(dtbl.NewRow());
Sqldata.DataSource = dtbl;
Sqldata.DataBind();
Sqldata.Rows[0].Cells.Clear();
Sqldata.Rows[0].Cells.Add(new TableCell());
Sqldata.Rows[0].Cells[0].ColumnSpan = dtbl.Columns.Count;
Sqldata.Rows[0].Cells[0].Text = "Não foi encontrado dados...";
Sqldata.Rows[0].Cells[0].HorizontalAlign = HorizontalAlign.Center;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("~/Lis_Mov_Admin.aspx"); //Mostrar tudo
}
protected void Button3_Click(object sender, EventArgs e)
{
//Pesquisa os dados da tabela usando textbox
string filter = "";
string command = "SELECT * FROM Movimentos WHERE";
if (textDataMovimento.Text != "")
{
filter = filter + "[Data Movimento] LIKE '%" + textDataMovimento.Text + "%' AND";
}
if (textDataValor.Text != "")
{
filter = filter + " [Data Valor] LIKE '%" + textDataValor.Text + "%' AND";
}
if (textDescricao.Text != "")
{
filter = filter + " [Descricao] LIKE '%" + textDescricao.Text + "%' AND";
}
if (textValor.Text != "")
{
filter = filter + " [Valor] LIKE '%" + textValor.Text + "%' AND";
}
if (textTipodeMovimento.Text != "")
{
filter = filter + " [Tipo de Movimento] LIKE '%" + textTipodeMovimento.Text + "%'AND";
}
if (filter.Length > 0)
{
Sqldata.DataSource = SqlDataSource1;
string FinalFilter = filter.Remove(filter.Length - 3);
SqlDataSource1.SelectCommand = command + FinalFilter;
Sqldata.DataBind();
}
else
{
Sqldata.DataBind();
}
}
public override void VerifyRenderingInServerForm(System.Web.UI.Control control)
{
//confirms that an HtmlForm control is rendered for the
//specified ASP.NET server control at run time.
}
protected void Button2_Click(object sender, EventArgs e)
{
Response.ClearContent();
Response.AppendHeader("content-disposition", "attachment; filename=register.xls");
Response.ContentType = "applicantion/excel";
StringWriter ad = new StringWriter();
HtmlTextWriter sd = new HtmlTextWriter(ad);
Sqldata.RenderControl(sd);
Response.Write(ad.ToString());
Response.End();
}
protected void myButton_1_Click(object sender, EventArgs e)
{
Response.Redirect("~/Imp_Mov_Admin.aspx");
}
protected void myButton_2_Click(object sender, EventArgs e)
{
Response.Redirect("~/Imp_Doc_Admin.aspx");
}
protected void myButton_3_Click(object sender, EventArgs e)
{
Response.Redirect("~/Lis_Mov_Admin.aspx");
}
protected void myButton_4_Click(object sender, EventArgs e)
{
Response.Redirect("~/Lis_Doc_Admin.aspx");
}
protected void myButton_6_Click(object sender, EventArgs e)
{
Response.Redirect("~/Dados_Sinc_Admin.aspx");
}
protected void myButton_5_Click(object sender, EventArgs e)
{
Response.Redirect("~/Dados_Nao_Admin.aspx");
}
protected void myButton_7_Click(object sender, EventArgs e)
{
Response.Redirect("~/Criar_Contas_Admin.aspx");
}
protected void mybutton_8_Click(object sender, EventArgs e)
{
Session["Nome"] = null;
Response.Redirect("~/Login.aspx");
}
protected void Sqldata_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
Sqldata.PageIndex = e.NewPageIndex;
Sqldata.DataSource= sqlCon ;
Sqldata.DataBind();
DataBind();
}
}
}
答案 0 :(得分：1)
在评论之后，我将在此处进行总结：
在html中，您需要确保“ onpageindexchanging”正在引用您的方法，例如onpageindexchanging =“ Sqldata_PageIndexChanging”。
在您的'Sqldata_PageIndexChanging'方法中，您需要确保数据正在反弹到gridview。查看您的代码，最初使用“ populateGridView”方法填充数据网格。假设此方法中绑定到gridview的数据是您需要的数据源，则应将获取数据的部分拆分为一部分，并将其放入数据表中，以便可以在其他地方引用。另外，如果数据不变，则可以将其存储到全局变量中，并在需要时引用它。最终，在您的'Sqldata_PageIndexChanging'方法中，您需要像这样设置DataSource：
protected void Sqldata_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
Sqldata.PageIndex = e.NewPageIndex;
Sqldata.DataSource= //your data source whether from global variable or new method;
Sqldata.DataBind();
}
答案 1 :(得分：1)
我希望您需要在 Sqldata_PageIndexChanging
中进行一些更改删除以下两行
Sqldata.DataSource= sqlCon ;
Sqldata.DataBind();
并将下面的populateGridView方法添加到Sqldata.PageIndex = e.NewPageIndex;