我有一个页面可以在单击按钮时动态创建网格视图，效果很好。随着它创建一个网格，在网格的顶部有一个链接按钮可以删除它。现在，我想要完成的是，当我删除其中一个网格时，它将从页面中删除网格并重新同步数字。意思是，假设我有以下内容：
Grid1
Grid2
Grid3
Grid4
如果我决定删除 Grid3，实际发生的情况是：
Grid1
Grid2
Grid4
然后，如果我单击页面上的某些内容以重新加载或其他内容，那么它将正确地重新同步数字：
Grid1
Grid2
Grid3
我不知道它为什么这样做，为什么它一开始不这样做。有人可以帮我吗？
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Page_Init(object sender, EventArgs e)
{
string ctrlname = this.Page.Request.Params.Get("__EVENTTARGET");
if (Session["Tables"] == null)
{
Session.Add("Tables", 1);
DataTable dt = GetTable();
Session.Add(Session["Tables"].ToString(), dt);
GridView gv = new GridView();
gv.ID = "Grid-" + Session["Tables"].ToString();
gv.DataSource = dt;
gv.DataBind();
LinkButton lb = new LinkButton();
lb.ID = "Delete-Grid-" + Session["Tables"].ToString();
lb.Text = "Delete Grid " + Session["Tables"].ToString();
lb.Click += new EventHandler(DeleteGrid);
PlaceHolder1.Controls.Add(lb);
PlaceHolder1.Controls.Add(gv);
}
if (IsPostBack)
{
PlaceHolder1.Controls.Clear();
int next = (int)Session["Tables"];
for (int i = 1; i <= (int)Session["Tables"]; i++)
{
GridView gv = new GridView();
gv.ID = "Grid-" + i.ToString();
gv.DataSource = (DataTable)Session[i];
gv.DataBind();
LinkButton lb = new LinkButton();
lb.ID = "Delete-Grid-" + i.ToString();
lb.Text = "Delete Grid " + i.ToString();
lb.Click += new EventHandler(DeleteGrid);
PlaceHolder1.Controls.Add(lb);
PlaceHolder1.Controls.Add(gv);
}
if (ctrlname == "Button1")
{
next = next + 1;
Session["Tables"] = next;
DataTable dt = GetTable();
Session.Add(Session["Tables"].ToString(), dt);
GridView gv = new GridView();
gv.ID = "Grid-" + next.ToString();
gv.DataSource = (DataTable)Session[next];
gv.DataBind();
LinkButton lb = new LinkButton();
lb.ID = "Delete-Grid-" + next.ToString();
lb.Text = "Delete Grid " + next.ToString();
lb.Click += new EventHandler(DeleteGrid);
PlaceHolder1.Controls.Add(lb);
PlaceHolder1.Controls.Add(gv);
}
}
}
protected void Button1_Click(object sender, EventArgs e)
{
}
protected void DeleteGrid(object sender, EventArgs e)
{
LinkButton gridLink = (LinkButton)sender;
String gridNum = gridLink.ID.ToString().Split('-').Last();
GridView grid = (GridView)this.Page.FindControl("Grid-" + gridNum);
LinkButton lbd = (LinkButton)this.Page.FindControl("Delete-Grid-" + gridNum);
PlaceHolder1.Controls.Remove(grid);
PlaceHolder1.Controls.Remove(lbd);
int next = (int)Session["Tables"];
next = next - 1;
Session.Add("Tables", next);
Session.Remove(gridNum);
}
public DataTable GetTable()
{
//
// Here we create a DataTable with a few columns.
//
// Create Datatable to store all colums
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("Size", typeof(string)));
dt.Columns.Add(new DataColumn("Description", typeof(string)));
dt.Columns.Add(new DataColumn("Quantity", typeof(string)));
dt.Columns.Add(new DataColumn("Unit", typeof(string)));
dt.Columns.Add(new DataColumn("Duration", typeof(string)));
dt.Columns.Add(new DataColumn("DurationType", typeof(string)));
dt.Columns.Add(new DataColumn("Amount", typeof(string)));
dr = dt.NewRow();
dr["RowNumber"] = 1;
dr["Size"] = string.Empty;
dr["Description"] = string.Empty;
dr["Quantity"] = string.Empty;
dr["Unit"] = string.Empty;
dr["Duration"] = string.Empty;
dr["DurationType"] = string.Empty;
dr["Amount"] = string.Empty;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["RowNumber"] = 2;
dr["Size"] = string.Empty;
dr["Description"] = string.Empty;
dr["Quantity"] = string.Empty;
dr["Unit"] = string.Empty;
dr["Duration"] = string.Empty;
dr["DurationType"] = string.Empty;
dr["Amount"] = string.Empty;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["RowNumber"] = 3;
dr["Size"] = string.Empty;
dr["Description"] = string.Empty;
dr["Quantity"] = string.Empty;
dr["Unit"] = string.Empty;
dr["Duration"] = string.Empty;
dr["DurationType"] = string.Empty;
dr["Amount"] = string.Empty;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["RowNumber"] = 4;
dr["Size"] = string.Empty;
dr["Description"] = string.Empty;
dr["Quantity"] = string.Empty;
dr["Unit"] = string.Empty;
dr["Duration"] = string.Empty;
dr["DurationType"] = string.Empty;
dr["Amount"] = string.Empty;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["RowNumber"] = 5;
dr["Size"] = string.Empty;
dr["Description"] = string.Empty;
dr["Quantity"] = string.Empty;
dr["Unit"] = string.Empty;
dr["Duration"] = string.Empty;
dr["DurationType"] = string.Empty;
dr["Amount"] = string.Empty;
dt.Rows.Add(dr);
return dt;
}
}