如何在会话中存储和检索动态表。 [英] How can store and retrieve a dynamic table in session.
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问题描述
I have created a dynamic table using Asp.net with c#. Now I want to store this dynamically created table in the session, How can i do that?
Thanks.
我尝试过：
What I have tried:
public partial class WebForm1 : System.Web.UI.Page
{
}
protected void Page_Load(object sender, EventArgs e)
{
}
public void CreateRuntime_Table()
{
int tblRows = int.Parse(txtrow.Text);
int tblCols = int.Parse(txtcol.Text);
Table tbl = new Table();
tbl.BorderWidth = 3;
tbl.BorderStyle = BorderStyle.Solid;
tbl.ID = "myTable";
for (int i = 1; i <= tblRows; i++)
{
TableRow tr = new TableRow();
for (int j = 1; j <= tblCols; j++)
{
TableCell tc = new TableCell();
TextBox txtbox = new TextBox();
txtbox.Text = "Test Row:" + i + "Test Col:" + " " + j;
//Add the control to the table cell
tc.Controls.Add(txtbox);
tr.Controls.Add(tc);
}
tbl.Rows.Add(tr);
}
form1.Controls.Add(tbl);
}
protected void Unnamed_Click(object sender, EventArgs e)
{
CreateRuntime_Table();
}
推荐答案
Quote：
我使用带有c＃的Asp.net创建了一个动态表。现在我想在会话中存储这个动态创建的表，我该怎么做？
I have created a dynamic table using Asp.net with c#. Now I want to store this dynamically created table in the session, How can i do that?
你不在会话中存储HTML表。相反，您将存储表中的行数和列数，以便根据先前的行数和列数在每个回发上重新创建表。这是一个简单的例子：
ASPX：
You don't store the HTML Table in Session. Instead you will store the rows and columns count from your Table so you can recreate your Table on each and every postbacks based from the previous rows and columns count. Here's a quick example:
ASPX:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Dynamic Adding of Rows in ASP Table Demo</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Add New Row" />
</form>
</body>
</html>
背后的代码：
CODE BEHIND:
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default1 : System.Web.UI.Page
{
//A global variable that will hold the current number of Rows
//We set the values to 1 so that it will generate a default Row when the page loads
private int numOfRows = 1;
protected void Page_Load(object sender, EventArgs e)
{
//Generate the Rows on Initial Load
if (!Page.IsPostBack){
GenerateTable(numOfRows);
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (Session["RowsCount"] != null)
{
numOfRows = Convert.ToInt32(Session["RowsCount"].ToString());
GenerateTable(numOfRows);
}
}
private void SetPreviousData(int rowsCount, int colsCount)
{
Table table = (Table)Page.FindControl("Table1");
if (table != null)
{
for (int i = 0; i < rowsCount; i++)
{
for (int j = 0; j < colsCount; j++)
{
//Extracting the Dynamic Controls from the Table
TextBox tb = (TextBox)table.Rows[i].Cells[j].FindControl("TextBoxRow_" + i + "Col_" + j);
//Use Request objects for getting the previous data of the dynamic textbox
tb.Text = Request.Form["TextBoxRow_" + i + "Col_" + j];
}
}
}
}
private void GenerateTable(int rowsCount)
{
//Creat the Table and Add it to the Page
Table table = new Table();
table.ID = "Table1";
Page.Form.Controls.Add(table);
//The number of Columns to be generated
const int colsCount = 3;//You can changed the value of 3 based on you requirements
// Now iterate through the table and add your controls
for (int i = 0; i < rowsCount; i++)
{
TableRow row = new TableRow();
for (int j = 0; j < colsCount; j++)
{
TableCell cell = new TableCell();
cell.ColumnSpan = colsCount;
TextBox tb = new TextBox();
// Set a unique ID for each TextBox added
tb.ID = "TextBoxRow_" + i + "Col_" + j;
// Add the control to the TableCell
cell.Controls.Add(tb);
// Add the TableCell to the TableRow
row.Cells.Add(cell);
}
// And finally, add the TableRow to the Table
table.Rows.Add(row);
}
//Set Previous Data on PostBacks
SetPreviousData(rowsCount, colsCount);
//Sore the current Rows Count in ViewState
rowsCount++;
Session["RowsCount"] = rowsCount;
}
}
读取此在ASP.NET中探索会话 [ ^ ]
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