C# 对Excel 表格进行查询，写入

C# 对Excel 表格进行查询，写入

C# 对xls 文件进行查询和写入

##查询xls

void selectXls()
        {
            //String Con = @"Provider=Microsoft.Jet.OleDb.4.0;Data Source=D:\list.mdb";
            if (!File.Exists(AgreementFile))
            {
                MessageBox.Show(@"D:\workfile\list.xls 不存在");
            }
            else
            {
                String Con = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + AgreementFile + "; Extended Properties='Excel 8.0;HDR=Yes;IMEX=1'"; ;
                OleDbConnection dbcon = new OleDbConnection(Con);
                dbcon.Open();
                try
                {
                    string sql = "SELECT F1,F14,F17,F18,F19,F20 FROM [合同申报单$] WHERE F1=\"" + Name + "\"";
                    //string sql = "SELECT * FROM [喷码$] ";
                    OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sql, dbcon);
                    DataSet OleDsExcel = new DataSet();
                    OleDaExcel.Fill(OleDsExcel, "合同申报单");
                    this.Invoke((Action)delegate ()
                    {
                        	dataGridView2.DataSource = OleDsExcel.Tables[0];
                            showbox("查询完成");
                            time_select = DateTime.Now.ToString("HH:mm:ss");
                            showbox(time_select);
                            SelcetResult = true;
                    });
                    dbcon.Close();
                    NUM = dataGridView2.Rows[0].Cells[1].Value.ToString();
                    io = Convert.ToInt32(NUM);
                    this.Invoke((Action)delegate
                    {
                        label8.Text = io.ToString();
                    });
                }
                catch (Exception e)
                {
                    showbox(e.ToString());
                }
                
            }

        }

写入xls

void InsertXls()
        {
            if (!File.Exists(RegisterFIle))
            {
                File.Copy(RegisterFIle_old, RegisterFIle);
            }
            string timenow = DateTime.Now.ToString("HH:mm:ss");
            try
            {
                NMAE_CLient = dataGridView2.Rows[0].Cells[0].Value.ToString();
                NUM = dataGridView2.Rows[0].Cells[1].Value.ToString();
                Label1 = dataGridView2.Rows[0].Cells[2].Value.ToString();
                Label2 = dataGridView2.Rows[0].Cells[3].Value.ToString();
                Label3 = dataGridView2.Rows[0].Cells[4].Value.ToString();
                Label4 = dataGridView2.Rows[0].Cells[5].Value.ToString();
            }
            catch (Exception x)
            {
                MessageBox.Show("请先查询");
                return;
            }
            String Con = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + RegisterFIle + "; Extended Properties='Excel 8.0;HDR=Yes;IMEX=3'"; ;
            OleDbConnection dbcon = new OleDbConnection(Con);
            dbcon.Open();
            OleDbCommand Accesscomm = new OleDbCommand();
            string sql = string.Format("INSERT INTO [喷码$](F2,F8,F4,F5,F6,F7,F14,F15,F16)VALUES('{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}')", NMAE_CLient, NUM, Label1, Label2, Label3, Label4, time_StartMark, time_select, time_StopMark);

            Accesscomm.CommandText = sql;
            Accesscomm.Connection = dbcon;
            int i=Accesscomm.ExecuteNonQuery();
            showbox("写入完成");
            dbcon.Close();
        }