6

我该如何解决这个错误:

指数超出范围。必须是非负数且小于集合的大小。参数名称:索引

在这段代码中:

dataGridView1.AllowUserToAddRows = false;
dataGridView1.Columns.Add("ID", "ID");
dataGridView1.Columns.Add("Firstname", "Firstname");
dataGridView1.Columns.Add("MI", "MI");
dataGridView1.Columns.Add("Lastname", "Lastname");
dataGridView1.Columns.Add("Username", "Username");
dataGridView1.Columns.Add("Rights", "Rights");
c.Open();
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = c;
cmd.CommandText = "SELECT * From Account";
OleDbDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
    dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["ID"].Value = reader[0].ToString();
    dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["Firstname"].Value = reader[1].ToString();
    dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["MI"].Value = reader[2].ToString();
    dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["Lastname"].Value = reader[3].ToString();
    dataGridView1.Rows[dataGridView1.Rows.Count -    1].Cells["Username"].Value = reader[7].ToString();
    dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["Rights"].Value      = reader[9].ToString();
}
c.Close();
4

2 回答 2

5

您是否尝试将数据从数据库显示到datagridview?为什么不使用databind

查看我的示例代码:

string connStr = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=the directory or the path of your database";
string query = "SELECT * From Table Name";
using (OleDbConnection conn = new OleDbConnection(connStr))
{
    using (OleDbDataAdapter adapter = new OleDbDataAdapter(query, conn))
    {
        DataSet ds = new DataSet();
        adapter.Fill(ds);
        dataGridView1.DataSource = ds.Tables[0];
    }
    conn.Close();
}
于 2013-03-04T01:04:28.633 回答
2

Rows 集合有一个接受对象数组的“添加”方法。与您问题中的代码示例相比,这绝对是一种更简单、更直接的方法:

http://msdn.microsoft.com/en-us/library/fbs04kbx.aspx

于 2013-03-04T01:34:22.350 回答