与数据库的数据显示出来，有什么错？

Question

string pa=@"d:\安装\练习打字\醚芪考试题.accdb";
            string lianshang=$"{Properties.Resources.solveRead_accdb}Data source={pa}";
            OleDbConnection connection = new OleDbConnection(lianshang);
            OleDbCommand cmd=new OleDbCommand("select * FROM 字符",connection);
            connection.Open();
            OleDbDataReader dr=cmd.ExecuteReader();
            DataTable dt=new DataTable();
            DataRow row=dt.NewRow();
            if(dr.HasRows){
                for(int z=0;z<dr.FieldCount;z++){
                    dt.Columns.Add(dr.GetName(z));
                }
                dt.Rows.Clear();
            }
            while(dr.Read()){
                for(int z=0;z<dr.FieldCount;z++){
                    row[z]=dr[z];
                }
                dt.Rows.Add(row);//这里出的错“该行已经属于此表”
            }cmd.Dispose();
            connection.Close();
            dataGridView1.DataSource=dt;
        }
    }
}

怎么办？

Answer 1

Hi,

你的问题是属于ADO.NET的开发，我们论坛主要是讨论VS安装和日常使用，我会帮你移到合适的论坛，这样方便你得到更好的帮忙，谢谢。

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Answer 2

已完结。。。