从Access Db到Treeview [英] From Access Db to Treeview
本文介绍了从Access Db到Treeview的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
string strProvider = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=axb.mdb";
string strSql = "SELECT Categories , subcategories FROM Categories INNER JOIN subcategories ON Categories .Key= subcategories.Id";
OleDbConnection con = new OleDbConnection(strProvider);
OleDbCommand cmd = new OleDbCommand(strSql, con);
con.Open();
cmd.CommandType = CommandType.Text;
OleDbDataReader dr = cmd.ExecuteReader();
DataTable dtTree = new DataTable();
int columnCount = dr.FieldCount;
for (int i = 0; i < columnCount; i++)
{
dataGridView1.Columns.Add(dr.GetName(i).ToString(), dr.GetName(i).ToString());
}
string[] rowData = new string[columnCount];
while (dr.Read())
{
for (int k = 0; k < columnCount; k++)
{
if (dr.GetFieldType(k).ToString() == "System.Int32")
{
rowData[k] = dr.GetInt32(k).ToString();
}
if (dr.GetFieldType(k).ToString() == "System.String")
{
rowData[k] = dr.GetString(k);
}
}
dataGridView1.Rows.Add(rowData);
}
我向datagrid添加了数据,但是我可以向treeview添加信息.
表类别和子类别与一对多的比率有关.
I add data to datagrid, but i can add information to treeview.
Table Categories and subcategories related to the ratio of one to many
推荐答案
那是什么问题?
请参阅此处 [
So what is the question?
See here[^]
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