Loading Excel data into a GridView

Hello All,

Here I am posting code, which will read through a Excel Document. This code will traverse through all sheets of Excel spread sheet, No matter what name they will have.

This uses OLEDB connection to read through excel sheets.

using System.Data.OleDb;

protected void Page_Load(object sender, EventArgs e)
{
	GetExcelSheetNames("Path");
}

private void GetExcelSheetNames(string excelFile)
{
	OleDbConnection objConn = null;
	System.Data.DataTable dt = null;
	try
	{
		DataSet ds = new DataSet();
		// Connection String. 
		String connString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelFile + ";Extended Properties=Excel 8.0;";
		// Create connection. 
		objConn = new OleDbConnection(connString);
		// Opens connection with the database. 
		objConn.Open();
		// Get the data table containing the schema guid, and also sheet names. 
		dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
		if (dt == null)
		{
			return;
		}
		String[] excelSheets = new String[dt.Rows.Count];
		int i = 0;
		// Add the sheet name to the string array. 
		// And respective data will be put into dataset table 
		foreach (DataRow row in dt.Rows)
		{
			excelSheets[i] = row["TABLE_NAME"].ToString();
			OleDbCommand cmd = new OleDbCommand("SELECT * FROM [" + excelSheets[i] + "]", objConn);
			OleDbDataAdapter oleda = new OleDbDataAdapter();
			oleda.SelectCommand = cmd;
			oleda.Fill(ds, "TABLE");
			i++;
		}
		// Bind the data to the GridView 
		GridView1.DataSource = ds.Tables[0].DefaultView;
		GridView1.DataBind();
		Session["Table"] = ds.Tables[0];
	}
	catch (Exception ex)
	{
		Response.Write(ex.Message);
		
	}
	finally
	{
		// Clean up. 
		if (objConn != null)
		{
			objConn.Close();
			objConn.Dispose();
		}
		if (dt != null)
		{
			dt.Dispose();
		}
	}
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
	GridView1.PageIndex = e.NewPageIndex;
	GridView1.DataSource = ((DataTable)Session["Table"]).DefaultView;
	GridView1.DataBind();
}

In .aspx file

<asp:GridView ID="GridView1" 
              runat="server" 
              AllowPaging="true" 
              PagerSettings-Mode="Numeric" 
              PagerSettings-Position="Bottom" 
              PagerStyle-Font-Size="Medium" 
              PageSize = "10" 
              OnPageIndexChanging="GridView1_PageIndexChanging" >
</asp:GridView>

This will have the data from the excel document in a gridview, with paging.