import data from excel to grid view

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C#

private void button2_Click_1(object sender, EventArgs e)
{



    string query = "SELECT column1,column2 FROM [Sheet1$]";



    try
    {

        String strConnectionString = "";

        strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
             "Data Source=" + "D:\\SubjectMaster.xls" + "; Jet OLEDB:Engine Type=5;" +
                                          "Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\";";
        OleDbConnection cnCSV = new OleDbConnection(strConnectionString);
        //cnCSV.Open();


        OleDbCommand cmdSelect = new OleDbCommand(query, cnCSV);
        OleDbDataAdapter daCSV = new OleDbDataAdapter();
        daCSV.SelectCommand = cmdSelect;


        OleDbDataReader dReader;
        dReader = cmdSelect.ExecuteReader();
        DataSet ds = new DataSet();

        SqlBulkCopy sqlBulk = new SqlBulkCopy(strConnectionString);
        //Give your Destination table name
        sqlBulk.DestinationTableName = "SubjectMaster";
        sqlBulk.ColumnMappings.Add(0, 1);
        sqlBulk.ColumnMappings.Add(1, 2);
        sqlBulk.WriteToServer(dReader);


        //System.Data. DataTable dtCSV = new System.Data. DataTable();
        DataSet da = new DataSet();
        daCSV.Fill(da);
        dataGridView1.DataSource = da.Tables[0];
        cnCSV.Close();
        MessageBox.Show("Successful");
    }
    catch (Exception )
    {



SqlConnection con = new SqlConnection("Server =KK-PC;Initial Catalog = EducaBase;User id = sa;Password = sa2008;");

   //  if Not Exists (SELECT * FROM SubjectMaster WHERE ID=NULL)
con.Open();
    SqlCommand com = new SqlCommand("INSERT Into  SubjectMaster (Su_ID,Su_Name,Su_Level_ID,Su_Level_SUB) VALUES (SUB10,Physics II,PUC,PHY)");
    //com.ExecuteNonQuery();

     MessageBox.Show("Successful");

      }

When i Click on button the excel file is not generated.
can any one help me to solve this problem.
Thanks.

Posted 18-Feb-14 19:34pm

Karthik Achari

Updated 18-Feb-14 19:35pm

v2

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Richard MacCutchan · Answer 1 · 2014-02-18T23:22:00

Solution 1

See Working with MS Excel(xls / xlsx) Using MDAC and Oledb[^].

Posted 18-Feb-14 23:22pm

Richard MacCutchan

Jubayer Ahmed · Answer 2 · 2014-02-19T18:45:00

Try this code:

C#

<table><tbody><tr><td><asp:fileupload id="testFileUpload" runat="server" xmlns:asp="#unknown" /></td><td><asp:button id="btnUpload" runat="server" height="21px" text="Upload" width="92px" onclick="btnUpload_Click" xmlns:asp="#unknown" /></td></tr></tbody></table>
   

    <br />  
    <asp:gridview id="dataGridView" runat="server" xmlns:asp="#unknown">
    </asp:gridview>

In your button event:

C#

try
        {
            if (testFileUpload.HasFile)
            {
                fileName = Path.GetFileName(testFileUpload.PostedFile.FileName);
                fileExtension = Path.GetExtension(testFileUpload.PostedFile.FileName);
                fileLocation = Server.MapPath("~/App_Data/" + fileName);

                GetData(fileLocation);
                Label1.Text = "File is ok to upload.";
            }
        }
        catch (Exception ex)
        {
            Label1.Text = "File is not expected formated.";
        }

C#

public void GetData(string loc)
    {
        testFileUpload.SaveAs(fileLocation);
        //Check whether file extension is xls or xslx

        if (fileExtension == ".xls")
        {
            connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + loc + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
        }
        else if (fileExtension == ".xlsx")
        {
            connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + loc + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
        }

        dtExcelRecords.Clear();
        dtExcelRecords.Reset();

        //Create OleDB Connection and OleDb Command

        con = new OleDbConnection(connectionString);

        cmd.CommandType = System.Data.CommandType.Text;
        cmd.Connection = con;
        dAdapter = new OleDbDataAdapter(cmd);

        con.Open();
        dtExcelSheetName = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
        getExcelSheetName = dtExcelSheetName.Rows[0]["Table_Name"].ToString();
        cmd.CommandText = "SELECT * FROM [" + getExcelSheetName + "]";
        dAdapter.SelectCommand = cmd;
        dAdapter.Fill(dtExcelRecords);
        con.Close();

        dataGridView.DataSource = dtExcelRecords;
        dataGridView.DataBind();

    }