"A quotation mark delimiter is missing from the end of the query." WinCE PDA 应用程序错误

Question

在我的 WinCE PDA 应用程序中，我将扫描的条码值与数据库中的条码值进行比较，以生成 table。

我这样构建查询：

for (int i = 0; i < listBox2.Items.Count; i++)
{
    if (i == 0)
    {
        sb.Append("Select * from ToolsBar where BarcodeValue in (");
    }

    sb.Append("'" + listBox2.Items[i] + "',");

}

sb.Length = sb.Length - 1;
sb.Append(")");

并在这里使用它：

cmd.CommandText = sb.ToString();
cmd.CommandType = CommandType.Text;

cmd.Connection = con;
con.Open();

reader = cmd.ExecuteReader(); // this is where the error came out  "A quotation mark delimiter is missing from the end of the query." 
reader.Close();
SqlCeDataAdapter ad = new SqlCeDataAdapter(sb.ToString(), con);
DataSet ds = new DataSet();
ad.Fill(ds);
dataGrid2.DataSource = ds.Tables[0];

con.Close();
sb.Length = 0;

Answer 1

构建查询的备用循环，无需更改字符串长度：

for (int i = 0; i < listBox2.Items.Count; i++)
{
    if (i == 0)
    {
        sb.Append("Select * from ToolsBar where BarcodeValue in (");
        sb.Append("'" + listBox2.Items[i] + "'");
    }
    else
    {
        sb.Append(",'" + listBox2.Items[i] + "'");
    }
}

sb.Append(")");