ASP.NET - travailler avec GridView par programmation
Je suis en continuant de ce post.
Après beaucoup de recherches sur Google, je suis venu avec ce code pour modifier des cellules de base du programme:
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 Ice_Web_Portal.BO;
namespace GridView___Test
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
GridView1.DataSource = Course.GetCourses();
GridView1.DataBind();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridViewRow row = GridView1.Rows[e.NewEditIndex];
GridView1.EditIndex = e.NewEditIndex;
GridView1.DataSource = Course.GetCourses();
GridView1.DataBind();
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
TextBox txtID = (TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0];
TextBox txtCourseCode = (TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0];
TextBox txtCourseName = (TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0];
TextBox txtCourseTextBookCode = (TextBox)GridView1.Rows[e.RowIndex].Cells[4].Controls[0];
Course item = new Course();
item.ID = Convert.ToInt32(txtID.Text);
item.CourseCode = txtCourseCode.Text;
item.CourseName = txtCourseName.Text;
item.TextBookCode = txtCourseTextBookCode.Text;
bool success = Course.Update(item);
labMessage.Text = success.ToString();
GridView1.EditIndex = -1;
GridView1.DataSource = Course.GetCourses();
GridView1.DataBind();
}
}
}Mais 2 problèmes se produisent.
(1) j'ai besoin d'appuyer sur les boutons de commande à deux reprises pour Modifier/mettre à Jour.
(2) les Changements dans les valeurs de cellule ne sont pas mis à jour dans la base de données. I. e. édité valeurs de cellule ne sont pas commettre.
Quelqu'un peut-il me donner une solution?
Mise à JOUR: Ma solution était comme ça:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="GridView___Test._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" Font-Names="Verdana" Font-Size="Small" AutoGenerateColumns="False" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowCommand="GridView1_RowCommand" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating">
</asp:GridView>
</div>
</form>
</body>
</html>
namespace GridView___Test
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//if (!Page.IsPostBack)
{
CreateGridView();
}
}
private void CreateGridView()
{
GridView1.Columns.Clear();
DataTable dataTable = Book.GetBooksDataSet().Tables[0];
CommandField cf = new CommandField();
cf.ShowEditButton = true;
GridView1.Columns.Add(cf);
int colCount = 1;
foreach (DataColumn c in dataTable.Columns)
{
BoundField boundField = new BoundField();
boundField.DataField = c.ColumnName;
boundField.HeaderText = c.ColumnName;
//boundField.FooterText = "---";
if (colCount == 3 || colCount == 5)
{
boundField.ReadOnly = true;
}
GridView1.Columns.Add(boundField);
colCount++;
}
GridView1.ShowFooter = true;
GridView1.DataSource = dataTable;
GridView1.DataBind();
GridViewRow footerRow = GridView1.FooterRow;
Button b = new Button();
b.Text = "Add New";
int i = 0;
footerRow.Cells[i].Controls.Add(b);
foreach (DataColumn c in dataTable.Columns)
{
++i;
TextBox tb = new TextBox();
footerRow.Cells[i].Controls.Add(tb);
}
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
int index = Convert.ToInt32(e.CommandArgument);
if (e.CommandName == "Edit")
{
//Takes the GridView to Edit mode.
GridView1.EditIndex = index;
GridViewRow selectedRow = ((GridView)e.CommandSource).Rows[index];
//We can get cell data like this
string id = selectedRow.Cells[1].Text;
string isbn = selectedRow.Cells[2].Text;
//This is necessary to GridView to be showed up.
CreateGridView();
}
else if (e.CommandName == "Update")
{
LinkButton updateButton = (LinkButton)e.CommandSource;
DataControlFieldCell dcfc = (DataControlFieldCell)updateButton.Parent;
GridViewRow gvr = (GridViewRow)dcfc.Parent;
//The update...................
//Update grid-data to database
UpdateDataInTheDatabase(gvr.Cells[1].Controls);
//Grid goes back to normal
GridView1.EditIndex = -1;
//This is necessary to GridView to be showed up.
CreateGridView();
}
}
private void UpdateDataInTheDatabase(ControlCollection cc)
{
TextBox tb = (TextBox)cc[0];
//...
//...
//...
//Call the update persistance code here...
}
#region Application Satisfactory Event Handlers
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
}
#endregion
}
}Vous devez vous connecter pour publier un commentaire.
pour le problème n ° 1,essayez de
pour le problème n ° 2, nous avons besoin de vérifier votre méthode
Course.Update(item).