[英]How to delete multiple checked items in a ListView?
protected void btndelete_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
for (int i = 0; i < listview1.Items.Count; i++)
{
ListViewDataItem items = listview1.Items[i];
CheckBox chkBox = (CheckBox)items.FindControl("chkdel");
if (chkBox.Checked == true)
{
if (Session["CurrentTable"] != null)
{
dt = (DataTable)Session["CurrentTable"];
dt.Rows.RemoveAt(i);
}
}
else
{
}
}
Session["CurrentTable"] = dt;
listview1.DataSource = dt;
listview1.DataBind();
BindDataToGridviewDropdownlist();
}
在這里,它僅刪除一行。 如何刪除列表視圖中的多個選中項?
正如上面的Hans Derks在評論中提到的那樣,您每次都從會話中獲取數據表,但實際上並沒有使用Session["CurrentTable"]=dt;
對其進行更新Session["CurrentTable"]=dt;
喜歡:
protected void btndelete_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
for (int i = 0; i < listview1.Items.Count; i++)
{
ListViewDataItem items = listview1.Items[i];
CheckBox chkBox = (CheckBox)items.FindControl("chkdel");
if (chkBox.Checked == true)
{
if (Session["CurrentTable"] != null)
{
dt = (DataTable)Session["CurrentTable"];
dt.Rows.RemoveAt(i);
Session["CurrentTable"]=dt;
listview1.DataSource = dt;
listview1.DataBind();
}
}
else
{
}
}
BindDataToGridviewDropdownlist();
}
重構版的Pranav的答案:
protected void btndelete_Click(object sender, EventArgs e)
{
// Get the Table from the session.
DataTable dt = (DataTable)Session["CurrentTable"];
// Only actually proceed, if we have a value.
if(dt != null)
{
// Loop through each item.
for (int i = 0; i < listview1.Items.Count - 1; i++)
{
// Find the checkbox to determine if it's checked.
ListViewDataItem items = listview1.Items[i];
CheckBox chkBox = (CheckBox)items.FindControl("chkdel");
if (chkBox.Checked == true)
{
// Remove the row at the current index.
dt.rows.RemoveAt(i);
}
}
// Update the session and rebind the data.
Session["CurrentTable"] = dt;
listview1.DataSource = dt;
listview1.DataBind();
BindDataToGridviewDropdownlist();
}
}
這對我有用...
protected void btndelete_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
if (Session["CurrentTable"] != null)
{
dt = (DataTable)Session["CurrentTable"];
int j = 0;
for (int i = 0; i < listview1.Items.Count; i++)
{
ListViewDataItem items = listview1.Items[i];
CheckBox chkBox = (CheckBox)items.FindControl("chkdel");
if (chkBox.Checked == true)
{
dt.Rows.RemoveAt(j);
dt.AcceptChanges();
}
else
{
j++;
}
}
Session["CurrentTable"] = dt;
listview1.DataSource = dt;
listview1.DataBind();
BindDataToGridviewDropdownlist();
}
}
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