我想通过单击按钮向表控件添加行。我尝试使用下面的代码,但收到错误,有人可以帮忙吗?
protected void btn_Click(object sender, EventArgs e)
{
//Table table = (Table)Page.FindControl("tblName");
TableRow tr = new TableRow();
tr.Cells.Add(new TableCell());
tr.Cells.Add(new TableCell());
tr.Cells.Add(new TableCell());
tr.Cells[0].Text = TextBox1.Text;
tr.Cells[1].Text = TextBox2.Text;
tr.Cells[2].Text = TextBox3.Text;
//add the row to the existing table.
this.tblName.Rows.Add(tr);
//this.tblName.Rows.Add();
}
-------------------- asp.net ------------------------ -
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" onclick="btn_Click" />
<table id="tblName" Runat="server" style="width:100%;">
<tr>
<td>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></td>
<td>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox></td>
<td>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox></td>
</tr>
</table>
<br />
</div>
</form>
答案 0 :(得分:1)
您非常接近,而不是System.Web.UI.WebControls.TableRow
您应该使用System.Web.UI.HtmlControls.HtmlTableRow
,因为您的表格类型为System.Web.UI.HtmlControls.HtmlTable
。
无论如何,你现有的代码缺少一些逻辑,因为它总是只添加一行,覆盖了你预先添加的内容。要继续添加,您必须存储已在某处添加的内容,理想的位置是ViewState集合。
优化的代码是:
//build array of new values
string[] currentValues = new string[] { TextBox1.Text, TextBox2.Text, TextBox3.Text };
//get list from view state and append new values
List<string[]> tableRowValues = (List<string[]>)ViewState["AppendedRows"];
if (tableRowValues == null)
tableRowValues = new List<string[]>();
tableRowValues.Add(currentValues);
//add rows to table
tableRowValues.ForEach(values =>
{
System.Web.UI.HtmlControls.HtmlTableRow tr = new System.Web.UI.HtmlControls.HtmlTableRow();
foreach (string value in values)
{
System.Web.UI.HtmlControls.HtmlTableCell cell = new System.Web.UI.HtmlControls.HtmlTableCell();
cell.InnerHtml = value;
tr.Cells.Add(cell);
}
this.tblName.Rows.Add(tr);
});
//update global container
ViewState["AppendedRows"] = tableRowValues;