利用Oledb操作XLS文件

简介：

解决方案：

Form1.designer.cs:

namespace XlsViaOledb{    partial class Form1    {        /// <summary>        /// Required designer variable.        /// </summary>        private System.ComponentModel.IContainer components = null;        /// <summary>        /// Clean up any resources being used.        /// </summary>        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>        protected override void Dispose(bool disposing)        {            if (disposing && (components != null))            {                components.Dispose();            }            base.Dispose(disposing);        }        #region Windows Form Designer generated code        /// <summary>        /// Required method for Designer support - do not modify        /// the contents of this method with the code editor.        /// </summary>        private void InitializeComponent()        {            this.components = new System.ComponentModel.Container();            this.dataGridView1 = new System.Windows.Forms.DataGridView();            this.comboBox1 = new System.Windows.Forms.ComboBox();            this.label1 = new System.Windows.Forms.Label();            this.button1 = new System.Windows.Forms.Button();            this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();            this.SuspendLayout();            //             // dataGridView1            //             this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;            this.dataGridView1.Location = new System.Drawing.Point(12, 34);            this.dataGridView1.Name = "dataGridView1";            this.dataGridView1.ShowCellToolTips = false;            this.dataGridView1.Size = new System.Drawing.Size(504, 233);            this.dataGridView1.TabIndex = 0;            this.dataGridView1.DataError += new System.Windows.Forms.DataGridViewDataErrorEventHandler(this.dataGridView1_DataError);            this.dataGridView1.MouseDown += new System.Windows.Forms.MouseEventHandler(this.dataGridView1_MouseDown);            //             // comboBox1            //             this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;            this.comboBox1.FormattingEnabled = true;            this.comboBox1.Location = new System.Drawing.Point(113, 9);            this.comboBox1.Name = "comboBox1";            this.comboBox1.Size = new System.Drawing.Size(130, 20);            this.comboBox1.TabIndex = 1;            //             // label1            //             this.label1.AutoSize = true;            this.label1.Location = new System.Drawing.Point(12, 12);            this.label1.Name = "label1";            this.label1.Size = new System.Drawing.Size(95, 12);            this.label1.TabIndex = 2;            this.label1.Text = "Select a sheet:";            //             // button1            //             this.button1.Location = new System.Drawing.Point(290, 9);            this.button1.Name = "button1";            this.button1.Size = new System.Drawing.Size(75, 21);            this.button1.TabIndex = 3;            this.button1.Text = "Show";            this.button1.UseVisualStyleBackColor = true;            this.button1.Click += new System.EventHandler(this.button1_Click);            //             // toolTip1            //             this.toolTip1.IsBalloon = true;            this.toolTip1.UseAnimation = false;            this.toolTip1.UseFading = false;            //             // Form1            //             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;            this.ClientSize = new System.Drawing.Size(528, 278);            this.Controls.Add(this.button1);            this.Controls.Add(this.label1);            this.Controls.Add(this.comboBox1);            this.Controls.Add(this.dataGridView1);            this.Name = "Form1";            this.Text = "Form1";            this.FormClosed += new System.Windows.Forms.FormClosedEventHandler(this.Form1_FormClosed);            this.Load += new System.EventHandler(this.Form1_Load);            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();            this.ResumeLayout(false);            this.PerformLayout();        }        #endregion        private System.Windows.Forms.DataGridView dataGridView1;        private System.Windows.Forms.ComboBox comboBox1;        private System.Windows.Forms.Label label1;        private System.Windows.Forms.Button button1;        private System.Windows.Forms.ToolTip toolTip1;    }}

Form.cs

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Data.OleDb;namespace XlsViaOledb{    public partial class Form1 : Form    {        OleDbConnection conn;        OleDbDataAdapter adapter;        DataTable dt;        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            // connect to xls file            // NOTE: it will be created if not exists            conn = new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;" +                "Data Source=" + Application.StartupPath + "\\test.xls;" +                "Extended Properties=Excel 8.0");            conn.Open();            // create a sheet "Sheet1" if not exists            // NOTE: no "id" field needed            // WARNING: spaces in sheet's name are supported if names are in [] (automatically replace with _)            // spaces in column names NOT supported with OleDbCommandBuilder!            try            {                string cmdText = "CREATE TABLE [Sheet 1] (text_col MEMO, int_col INT)";                using (OleDbCommand cmd = new OleDbCommand(cmdText, conn))                {                    cmd.ExecuteNonQuery();                }            }            catch { }            // get sheets list into combobox            dt = conn.GetSchema("Tables");            for (int i = 0; i < dt.Rows.Count - 1; i++)            {                if (dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_TYPE")].ToString() == "TABLE" &&                    !dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")].ToString().Contains("$"))                {                    comboBox1.Items.Add(dt.Rows[i].ItemArray[dt.Columns.IndexOf("TABLE_NAME")]);                }            }        }        private void button1_Click(object sender, EventArgs e)        {            adapter = new OleDbDataAdapter("SELECT * FROM " + comboBox1.SelectedItem.ToString(), conn);            new OleDbCommandBuilder(adapter);            dt = new DataTable();            adapter.Fill(dt);            dataGridView1.DataSource = dt;        }        private void Form1_FormClosed(object sender, FormClosedEventArgs e)        {            if (adapter == null) return;            adapter.Update(dt);        }        // show tooltip (not intrusive MessageBox) when user trying to input letters into INT column cell        private void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e)        {            if (dt.Columns[e.ColumnIndex].DataType == typeof(Double))            {                Rectangle rectColumn;                rectColumn = dataGridView1.GetColumnDisplayRectangle(e.ColumnIndex, false);                Rectangle rectRow;                rectRow = dataGridView1.GetRowDisplayRectangle(e.RowIndex, false);                toolTip1.ToolTipTitle = "This field is for integers and decimals only.";                toolTip1.Show(" ",                          dataGridView1,                          rectColumn.Left, rectRow.Top + rectRow.Height);            }        }        private void dataGridView1_MouseDown(object sender, MouseEventArgs e)        {            toolTip1.Hide(dataGridView1);        }    }}

利用Oledb操作Xlsx文件