int index = -1;
foreach (GridViewRow gvrow in lstHoliday.Rows)
{
index = (int)lstHoliday.DataKeys[gvrow.RowIndex].Value;
bool result = ((CheckBox)gvrow.FindControl("Selector")).Checked;
}
ここでエラーを取得します。
index = (int)lstHoliday.DataKeys[gvrow.RowIndex].Value;
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
ここで何が間違っていますか?