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[英]invalidargument=value of '8' is not valid for 'index'
[英]InvalidArgument=Value of '1' is not valid for 'index'
與MDB訪問數據庫交互的C#應用程序中出現錯誤。
錯誤是:
InvalidArgument =值“ 1”對“索引”無效。
我的代碼:
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();
列表視圖包含以下列:ID-數字-帳單日期-供應商-總計-注意
我可能已經發現了問題。
如果第一次圍繞“ if(Date1> = 0 && Date2 <= 0)”狀態評估結果為false,則i索引仍將遞增。 然后在第二次迭代中,如果if語句的計算結果可能為true,則索引將一一對應,因為ListView中只有一個Item,但是您嘗試使用listView1.Items [1],而不是listView1.Items [0],這是正確的。
解決方案是將代碼更改為:
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++;
}
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