C# ASP.NET动态生成的TableRows赢得';在回发之间不能持久
在ASPX中C# ASP.NET动态生成的TableRows赢得';在回发之间不能持久,c#,asp.net,C#,Asp.net,在ASPX中 <asp:Table ID="superTable" runat="server" Width="100%"> <%--populate me on the fly!--%> </asp:Table> <asp:Button ID="btnAddRow" runat="server" CausesValidation="false" Text="Add Row" onclick="btnAddRow_Click" Width="9
<asp:Table ID="superTable" runat="server" Width="100%">
<%--populate me on the fly!--%>
</asp:Table>
<asp:Button ID="btnAddRow" runat="server" CausesValidation="false" Text="Add Row" onclick="btnAddRow_Click" Width="90%"/>
<asp:Button ID="btnRemoveRow" runat="server" CausesValidation="false" Text="Remove Last Row" onclick="btnRemoveRow_Click" Width="90%"/>
<asp:Button ID="btnSubmit" runat="server" Text="1" onclick="btnSubmit_Click" Width="90%"/>
码后相关位
protected void Page_Load(object sender, EventArgs e)
{if (!IsPostBack){ writeHeader(); makeMeARow(); }}
protected void btnAddRow_Click(object sender, EventArgs e)
{
if (int.Parse(btnSubmit.Text) <= 20)
{ int b = superTable.Rows.Count+1;
writeHeader();
btnSubmit.Text = (int.Parse(btnSubmit.Text) + 1).ToString();
for (int a = 1; a <= int.Parse(btnSubmit.Text); a++)
{ makeMeARow(); }
}
else{/*tell user they can't do that! Max of 20 rows as noted by form requirements */}
}
private void writeHeader()
{
//= == create row == =//
TableHeaderRow tempHeaderRow = new TableHeaderRow();//make row
//= == create cells == =//
TableHeaderCell tempHeaderCell01 = new TableHeaderCell();
TableHeaderCell tempHeaderCell02 = new TableHeaderCell();
TableHeaderCell tempHeaderCell03 = new TableHeaderCell();
tempHeaderCell01.Text = "Call Number"; tempHeaderCell01.Width = Unit.Percentage(33);
tempHeaderCell02.Text = "Author"; tempHeaderCell02.Width = Unit.Percentage(33);
tempHeaderCell03.Text = "Title"; tempHeaderCell03.Width = Unit.Percentage(33);
//= == add TableCells to TableRow == =//
tempHeaderRow.Cells.Add(tempHeaderCell01);
tempHeaderRow.Cells.Add(tempHeaderCell02);
tempHeaderRow.Cells.Add(tempHeaderCell03);
//superTable.Rows.AddAt(superTable.Rows.Count, tempRow);
superTable.Rows.Add(tempHeaderRow);
}
protected void btnRemoveRow_Click(object sender, EventArgs e)
{ int b = superTable.Rows.Count - 1;
writeHeader();
btnSubmit.Text = (int.Parse(btnSubmit.Text) - 1).ToString();
for (int a = 1; a <= int.Parse(btnSubmit.Text); a++)
{makeMeARow();}
}
private void makeMeARow()
{
//= == maybe off by one? == =//
string rowCount = superTable.Rows.Count.ToString("00");
//= == create row == =//
TableRow tempRow = new TableRow();//make row
//= == create cells == =//
TableCell tempCell01 = new TableCell();
TableCell tempCell02 = new TableCell();
TableCell tempCell03 = new TableCell();
//= == create TextBoxes == =//
TextBox tempTextBox01 = new TextBox();
TextBox tempTextBox02 = new TextBox();
TextBox tempTextBox03 = new TextBox();
//= == change the ID of TableRow == =//
tempRow.ID = "tableRow_" + rowCount;
//= == change the IDs of TableCells == =//
tempCell01.ID = "tableCell_" + rowCount + "_01";
tempCell02.ID = "tableCell_" + rowCount + "_02";
tempCell03.ID = "tableCell_" + rowCount + "_03";
//= == change the IDs of TextBoxes == =//
tempTextBox01.ID = "txtCallNumber_" + rowCount;
tempTextBox02.ID = "txtAuthor_" + rowCount;
tempTextBox03.ID = "txtTitle_" + rowCount;
//= == change TextBox widths to 90%;
tempTextBox01.Width = Unit.Percentage(90);
tempTextBox02.Width = Unit.Percentage(90);
tempTextBox03.Width = Unit.Percentage(90);
//= == add TextBoxes to TableCells == =//
tempCell01.Controls.Add(tempTextBox01);
tempCell02.Controls.Add(tempTextBox02);
tempCell03.Controls.Add(tempTextBox03);
//= == add TableCells to TableRow == =//
tempRow.Cells.Add(tempCell01);
tempRow.Cells.Add(tempCell02);
tempRow.Cells.Add(tempCell03);
//add TableRow to superTable
//superTable.Rows.AddAt(superTable.Rows.Count, tempRow);
superTable.Rows.Add(tempRow);
}
受保护的无效页面加载(对象发送方,事件参数e)
{if(!IsPostBack){writeHeader();makeMeARow();}
受保护的无效btnAddRow\u单击(对象发送者,事件参数e)
{
if(int.Parse(btnSubmit.Text)每次回发时,必须将动态控件重新添加到表单中。通常,这是在页面生命周期的Init
阶段完成的。动态添加的控件实际上具有ViewState。当使用与以前完全相同的ID将相应的控件重新添加到控件树中时,它应该重新出现h保存在ViewState中的值
查看有关使用动态控件的简单提示,或者您可以从中查看本教程以获得更深入的了解。不确定-如何以及在何处执行此操作?我不认为ASP:Table应该在ViewState中保留其内容,但我不完全确定。通常在库存ASP.NET中,您应该恢复每个po上的所有动态控件stback。如果您没有足够的数据用于it服务器端,您可以将其他信息放入ViewState。@雕像-页面的ViewState将在页面顶部的@page
标记中指定。added EnableViewState=“true”仍然不走运:(为什么不使用任何数据驱动控件,如ListView、GridView、Repeater?