[英]Get unchecked values from CheckBoxList in c#
我正在嘗試從button_click中的CheckBoxList
更新未檢查的值。 並且無法獲取CheckBoxList
未選中項的值。
我用於填充chechboxlist的代碼是
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager
.ConnectionStrings["constr"].ConnectionString;
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select * from hobbies";
cmd.Connection = conn;
conn.Open();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
ListItem item = new ListItem();
item.Text = sdr["Hobby"].ToString();
item.Value = sdr["HobbyId"].ToString();
item.Selected = Convert.ToBoolean(sdr["IsSelected"]);
chkHobbies.Items.Add(item);
}
}
conn.Close();
}
}
我正在使用答案https://stackoverflow.com/a/410505/2376607
但這是針對Windows窗體的
請幫助如何獲取CheckBoxList
的未經檢查的值。
您可以嘗試以下代碼示例:-
string chkboxlistValue = "";
string uncheckedId = "";
foreach (ListItem val in chkbxId.Items)
{
if (val.Selected)
{
chkboxlistValue += val.Value + " ";
}
else
{
uncheckedId += val.Value + ",";
}
}
foreach (ListItem item in chkHobbies.Items)
{
if (item.Selected == false)
{
// your code here
}
}
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