如何将数据从Excel工作表导入到SQL Server表中？

Question

Hi. I want to import the excel sheet data to SQL server table,for that I wrote code like as below. The sheet is uploading into folder,but the data is not imported to table,can anyone tell me please where is the mistake....

public partial class upload2 : System.Web.UI.Page
    {
        private string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                PopulateDatabaseTables();
            }
        }

        private void PopulateDatabaseTables()
        {
            string tableName = string.Empty;
            string sql = "SELECT *, name AS table_name " +
                " FROM sys.tables WHERE Type = 'U' ORDER BY table_name";
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                using (DataTable table = new DataTable())
                {
                    conn.Open();
                    using (SqlDataAdapter dAd = new SqlDataAdapter(sql, conn))
                    {
                        dAd.Fill(table);
                    }
                    ListBox1.DataSource = table;
                    ListBox1.DataBind();
                }
            }
        }

        protected void ImportNow_Click(object sender, EventArgs e)
        {
            if (ListBox1.SelectedValue == "")
            {
                lblMessage.ForeColor = Color.Red;
                lblMessage.Text = "Please select table in which you want to import data from excel sheet";
            }
            else if ((fileuploadExcel.FileName != ""))
            {
                string extension = Path.GetExtension(fileuploadExcel.PostedFile.FileName);

                string excelConnectionString;
                SqlConnection conn = new SqlConnection(connStr);
                string tableName = ListBox1.SelectedValue;
               // string path = fileuploadExcel.PostedFile.FileName;
                string path = Server.MapPath("~/fileuploadExcel/" + fileuploadExcel.FileName);
                fileuploadExcel.SaveAs(path);
                Response.Write("path=" + path);
                return;
                //Create connection string to Excel work book
                if (extension == ".xlsx")
                {
                    excelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=+ path +
                                                          ;Extended Properties=Excel 8.0;Persist Security Info=False";
                }
                else
                {
                    excelConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;sData Source= + path +
                                                         ;Extended Properties=Excel 12.0;Persist Security Info=False";
                }

                //Create Connection to Excel work book
                SqlConnection excelConnection = new SqlConnection(excelConnectionString);
                //Create OleDbCommand to fetch data from Excel             
                conn.Open();
                SqlCommand comm = new SqlCommand("truncate table " + tableName, conn);
                SqlCommand identityChange = conn.CreateCommand();
                identityChange.CommandText = "SET IDENTITY_INSERT " + tableName + " ON";
                SqlCommand cmd = new SqlCommand("Select * from [Sheet1$]", excelConnection);
                excelConnection.Open();
                SqlDataReader dReader;
                dReader = cmd.ExecuteReader();
                identityChange.ExecuteNonQuery();
                SqlBulkCopy sqlBulk = new SqlBulkCopy(connStr);
                //Give your Destination table name
                sqlBulk.DestinationTableName = tableName;
                sqlBulk.WriteToServer(dReader);
                excelConnection.Close();
                conn.Close();
                lblMessage.ForeColor = Color.Green;
                lblMessage.Text = "Import into table <b>" + tableName + "</b> successful!<br />";
            }
            else
            {
                lblMessage.ForeColor = Color.Red;
                lblMessage.Text = "Please first upload (Select) excel file.";
            }
        }

        protected void viewdata_Click(object sender, EventArgs e)
        {
            BindData();
        }

        private void BindData()
        {
            try
            {
                if (ListBox1.SelectedValue == "")
                {
                    lblMessage.ForeColor = Color.Red;
                    lblMessage.Text = "Please select table for which you want to view data in Gridview";
                }
                else
                {
                    string tableName = ListBox1.SelectedValue;
                    SqlConnection conn = new SqlConnection(connStr);
                    SqlDataAdapter sda = new SqlDataAdapter("select * from " + tableName, conn);
                    DataSet ds = new DataSet();
                    sda.Fill(ds);
                    gvdetails.DataSource = ds;
                    gvdetails.DataBind();
                }
            }
            catch (DataException de)
            {
                lblMessage.Text = de.Message;
                lblMessage.ForeColor = System.Drawing.Color.Red;
            }
        }

        protected void gvdetails_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            gvdetails.PageIndex = e.NewPageIndex;
            BindData();
        }
    }
}

Answer 1

excelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source= + path + ;Extended Properties=Excel 8.0;Persist Security Info=False";

here you have directly used path , modify excelConnectionString as follows

excelConnectionString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}
                                                      ;Extended Properties=Excel 8.0;Persist Security Info=False",path);

Answer 2

Why dont you use MS SQL Server Import and Export Wizard.. it is easiest method ever.

reffer this url and you can get exect idea. Click Here to View

Hope it helps you...

Answer 3

If you don't have Office installed on the server you may find it won't find the providers in your connection string...

Provider=Microsoft.Jet.OLEDB.4.0;

Provider=Microsoft.ACE.OLEDB.12.0

Unfortunate but Microsoft never designed it to work without the server host paying extra to run Office on their server.