我正在动态生成复选框,所有这些都写在page_load中,当我尝试检查复选框时显示错误,
错误行:
CheckBox cb = (CheckBox)Page.FindControl("chk" + j);
错误:找到了具有相同ID“1”的多个控件。 FindControl要求控件具有唯一ID
我的要求是:
如果我选中复选框,我想要检查复选框的数量,单选按钮会出现相对选中的复选框。
以下是代码:
string strfromdt = Session["leavefrm"].ToString();
DateTime startDate = Convert.ToDateTime(strfromdt);
string strtodt = Session["leaveto"].ToString();
DateTime endDate = Convert.ToDateTime(strtodt);
string strdays = Session["noofdays"].ToString();
float daysf = float.Parse(strdays);
float days = (float)Math.Ceiling(daysf);
CheckBox chk;
Label lbl;
RadioButton rd;
days++;
OleDbCommand cmd;
DbConnection.Open();
cmd = new OleDbCommand("select HOL_DATE from IND_HOLIDAYS", DbConnection);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
for (int j = 1; j <= days - 1; j++)
{
while(startDate <= endDate)
{
for (int i = 0; i <= dt.Rows.Count - 1; i++)
{
string strdate = dt.Rows[i]["HOL_DATE"].ToString();
DateTime date = Convert.ToDateTime(strdate);
if (startDate == date)
startDate = startDate.AddDays(1);
}
if ((startDate.DayOfWeek == DayOfWeek.Saturday) || ((startDate.DayOfWeek == DayOfWeek.Sunday)))
{
startDate = startDate.AddDays(1);
continue;
}
break;
}
chk = new CheckBox();
chk.ID = j.ToString();
chk.AutoPostBack = true;
// chk.Checked = true;
lbl = new Label();
lbl.Text = startDate.ToString("dd/MM/yyyy");
lbl.ID = j.ToString();
PlaceHolder1.Controls.Add(lbl);
PlaceHolder1.Controls.Add(chk);
PlaceHolder1.Controls.Add(new RadioButton { });
PlaceHolder1.Controls.Add(new LiteralControl("<BR>"));
startDate = startDate.AddDays(1);
CheckBox cb = (CheckBox)Page.FindControl("chk" + j);
//chk.Checked = CheckBox1Checked;
//chk.oncheckedchanged += CheckBox1OnChecked;
int chkcount = 0;
if (chk.Checked)
{
chkcount++;
}
int chkcount1 = chkcount;
}
答案 0 :(得分:0)
您为chk
和lbl
提供了相同的ID(两者都是j.ToString()
),您需要将它们设为唯一:
chk.ID = string.Format("chk{0}", j);
lbl.ID = string.Format("lbl{0}", j);
// Now you can FindControl:
CheckBox cb = (CheckBox)Page.FindControl("chk" + j);
答案 1 :(得分:0)
您需要在OnInit方法中添加动态控件,以便在所有情况下都能正常工作。我记得在Page_Load中添加了动态控件的问题。
RGraham已经指出错误,相同的ID被添加到不同的控件中。
此外,这个声明似乎没有任何用途
PlaceHolder1.Controls.Add(new RadioButton {});