UC知道索引超出数组的界限 C#
来源：百度知道 编辑：UC知道 时间：2024/09/20 02:33:36
private void btnSearch_Click(object sender, EventArgs e)
{
SqlCommand cmd = null;
SqlDataReader sdr=null;
try
{
string sql = "select Answer from question where subjectid=8";
cmd = new SqlCommand(sql, DBHelper.conn);
DBHelper.conn.Open();
sdr = cmd.ExecuteReader();
if (!sdr.HasRows)
{
MessageBox.Show("数据库中无正确答案!!");
}
else
{
while (sdr.Read())
{
for (int i = 1; i < Common.CorrectAnswer.Length; i++)
{
Common.CorrectAnswer[Common.Index] = sdr["Answer"].ToString();
{
SqlCommand cmd = null;
SqlDataReader sdr=null;
try
{
string sql = "select Answer from question where subjectid=8";
cmd = new SqlCommand(sql, DBHelper.conn);
DBHelper.conn.Open();
sdr = cmd.ExecuteReader();
if (!sdr.HasRows)
{
MessageBox.Show("数据库中无正确答案!!");
}
else
{
while (sdr.Read())
{
for (int i = 1; i < Common.CorrectAnswer.Length; i++)
{
Common.CorrectAnswer[Common.Index] = sdr["Answer"].ToString();
for (int i = 1; i < Common.CorrectAnswer.Length; i++)
估计是这个问题，用message看看他的length到底是多少
还有就是Common.Index
for (int i = 1; i < Common.CorrectAnswer.Length; i++)
{
Common.CorrectAnswer[Common.Index] = sdr["Answer"].ToString();
Common.Index++;
}
这句话不对你既然循环了 i,干嘛里面又用Common.Index？
Common.Index的初始值是多少？
另外c#数组是从0开始而不是1
for(int i=0;i<common.correctAnswer.Length;i++)
在c#中数组下标都是从0开始计算的