【发布时间】：2017-04-21 04:13:01
【问题描述】：
我找到了创建动态表并添加行的教程：
如何读取表格中的所有行，然后读取单元格中文本框的值？这些值被输入到数据库（SQL Server）的表中。 我可以继续使用 C# 和 asp.net 还是必须使用 Javascript？
希望有人能帮帮我。
这是代码：
<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>
代码隐藏：
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 (ViewState["RowsCount"] != null)
{
numOfRows = Convert.ToInt32(ViewState["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();
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++;
ViewState["RowsCount"] = rowsCount;
}
}
【问题讨论】：
-
你能把你的代码贴在这里吗，我以前用过类似的方法。我可以帮你。您需要为每个文本框指定 textchanged 事件，并且在客户端使用 javascript 您可以更改文本框的 ID 和值，然后使用隐藏字段将其保存在服务器端以临时存储它们。
-
代码中是否总是返回null Table table = (Table)Page.FindControl("Table1");设置断点并检查