我的C#应用程序中有一个与MDB访问数据库交互的错误。
错误是:
InvalidArgument =' 1'的值不适用于' index'。
我的代码:
objConn.Open();
listView1.Items.Clear();
OleDbCommand cmd = new OleDbCommand("select a.bill_Id,a.bill_Number,a.bill_Date,c.sup_Name,Sum(b.de_NetPrice),a.bill_Note from (suppliers c right JOIN bills a on c.sup_Id = a.bill_From) LEFT JOIN bill_Details b on a.bill_Id = b.bill_Id where a.bill_Id like '%" + txbSearch.Text + "%' or a.bill_Number like '%" + txbSearch.Text + "%' or c.sup_Name like '%" + txbSearch.Text + "%' or a.bill_Note like '%" + txbSearch.Text + "%' group by a.bill_Id,a.bill_Number,a.bill_Date,c.sup_Name,a.bill_Note order by a.bill_Date desc", objConn);
OleDbDataReader dataReader = cmd.ExecuteReader();
int i = 0;
while (dataReader.Read())
{
DateTime dt0 = DateTime.Parse(dataReader.GetValue(2).ToString());
int Date1 = DateTime.Compare(DateTime.Parse(dt0.ToShortDateString()), DateTime.Parse(txbFrom.Value.ToShortDateString()));
int Date2 = DateTime.Compare(DateTime.Parse(dt0.ToShortDateString()), DateTime.Parse(txbTo.Value.ToShortDateString()));
if (Date1 >= 0 && Date2 <= 0)
{
listView1.Items.Add(dataReader.GetValue(0).ToString());
// The error happens on the following line
listView1.Items[i].SubItems.Add(dataReader.GetValue(1).ToString());
listView1.Items[i].SubItems.Add(dt0.ToShortDateString());
listView1.Items[i].SubItems.Add(dataReader.IsDBNull(3) ? "0" : dataReader.GetString(3));
listView1.Items[i].SubItems.Add(dataReader.IsDBNull(4) ? "0" : dataReader.GetDouble(4).ToString("n2"));
listView1.Items[i].SubItems.Add(dataReader.IsDBNull(5) ? "-" : dataReader.GetString(5));
}
i++;
}
objConn.Close();
listview包含以下列: ID - 编号 - BillDate - 供应商 - 总计 - 注意
答案 0 :(得分:0)
我可能已经找到了这个问题。
如果第一次围绕'if(Date1&gt; = 0&amp;&amp; Date2&lt; = 0)'statemant计算为false,则i索引仍然会递增。然后在第二次迭代中,if语句可能会评估为true,然后你的索引将逐个进行,因为ListView中只有一个Item,但是你尝试使用listView1.Items [1],而不是listView1.Items [0],这是正确的。
解决方案是将代码更改为:
if (Date1 >= 0 && Date2 <= 0)
{
listView1.Items.Add(dataReader.GetValue(0).ToString());
listView1.Items[i].SubItems.Add(dataReader.GetValue(1).ToString());// The error appears on this line
listView1.Items[i].SubItems.Add(dt0.ToShortDateString());
listView1.Items[i].SubItems.Add(dataReader.IsDBNull(3) ? "0" : dataReader.GetString(3));
listView1.Items[i].SubItems.Add(dataReader.IsDBNull(4) ? "0" : dataReader.GetDouble(4).ToString("n2"));
listView1.Items[i].SubItems.Add(dataReader.IsDBNull(5) ? "-" : dataReader.GetString(5));
i++;
}