c#asp.netexcelgridviewexport-to-excel
Export to excel from Gridview with color codes
I'm using color code based on some percentage logic in the GridView. But while exporting to Excel I dont know how to maintain this color code in the Excel. Please guide
Below is the code for RowDataBound
protected void Grd_QADetails_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var dataRowView = e.Row.DataItem as DataRowView;
DataRow row = dataRowView.Row;
var Current = (row["Current Month Percentage"] as double?) ?? null;
double? Yellow = (double?)Convert.ToDouble(row["Yellow"]);
double? Green = (double?)Convert.ToDouble(row["Green"]);
if (Current != null)
{
if (Current >= Green)
e.Row.Cells[6].BackColor = Color.Green;
if (Current >= Yellow && Current < Green)
e.Row.Cells[6].BackColor = Color.Yellow;
if (Current < Yellow)
e.Row.Cells[6].BackColor = Color.Red;
}
}
}
Below is the code for Export to Excel
private void ExportthroughWeb(DataTable dt, string FileName)
{
try
{
if (dt.Rows.Count > 0)
{
string filename = FileName + ".xls";
using (System.IO.StringWriter tw = new System.IO.StringWriter())
{
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
DataGrid dgGrid = new DataGrid();
dgGrid.DataSource = dt;
dgGrid.DataBind();
//Get the HTML for the control.
dgGrid.RenderControl(hw);
//Write the HTML back to the browser.
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename + "");
this.EnableViewState = false;
Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">" + Environment.NewLine);
Response.Write(tw.ToString());
Response.Write("</body>");
Response.Write("</html>");
Response.End();
}
}
}
Solution
You need to attach an event handler for RowDataBound
Please modify your code as follows:
private void ExportthroughWeb(DataTable dt, string FileName)
{
try
{
if (dt.Rows.Count > 0)
{
string filename = FileName + ".xls";
using (System.IO.StringWriter tw = new System.IO.StringWriter())
{
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
GridView dgGrid = new GridView();
dgGrid.DataSource = dt;
dgGrid.RowDataBound += new GridViewRowEventHandler(Grd_QADetails_RowDataBound);
dgGrid.DataBind();
//Get the HTML for the control.
dgGrid.RenderControl(hw);
//Write the HTML back to the browser.
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename + "");
this.EnableViewState = false;
Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">" + Environment.NewLine);
Response.Write(tw.ToString());
Response.Write("</body>");
Response.Write("</html>");
Response.End();
}
}
Hope this helps..
My Tested Example: Update
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="webapp1._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:GridView runat="server" ID="grdDetails" OnRowDataBound="Grd_QADetails_RowDataBound">
</asp:GridView>
<asp:Button runat="server" ID="btnSubmit" OnClick="ExportToGrid"/>
</asp:Content>
Code behind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Drawing;
namespace webapp1
{
public partial class _Default : System.Web.UI.Page
{
DataTable dtDetails = new DataTable();
protected void Grd_QADetails_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
var dataRowView = e.Row.DataItem as DataRowView;
DataRow row = dataRowView.Row;
var Current = (row["Dosage"] as int?) ?? null;
if (Current != null)
{
if (Current >= 1 && Current < 10)
e.Row.Cells[1].BackColor = Color.Green;
else if (Current >= 10 && Current < 20)
e.Row.Cells[1].BackColor = Color.Yellow;
else
e.Row.Cells[1].BackColor = Color.Red;
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
dtDetails.Columns.Add("Dosage", typeof(int));
dtDetails.Columns.Add("Drug Suggested", typeof(string));
dtDetails.Columns.Add("Patient Name", typeof(string));
dtDetails.Columns.Add("Date", typeof(DateTime));
dtDetails.Columns.Add("Type", typeof(string));
dtDetails.Columns.Add("Payment Mode", typeof(string));
dtDetails.Columns.Add("Appointment Status", typeof(string));
dtDetails.Columns.Add("Location", typeof(string));
dtDetails.Rows.Add(1, "Indocin", "David", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(2, "Enebrel", "Sam", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(3, "Hydralazine", "Christoff", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(4, "Combivent", "Janet", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(5, "Dilantin", "Melanie", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(6, "Indocin", "David", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(7, "Enebrel", "Sam", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(8, "Hydralazine", "Christoff", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(9, "Combivent", "Janet", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(10, "Dilantin", "Melanie", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(11, "Indocin", "David", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(12, "Enebrel", "Sam", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(13, "Hydralazine", "Christoff", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(14, "Combivent", "Janet", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(15, "Dilantin", "Melanie", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(16, "Indocin", "David", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(17, "Enebrel", "Sam", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(18, "Hydralazine", "Christoff", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(19, "Combivent", "Janet", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(20, "Dilantin", "Melanie", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(21, "Indocin", "David", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(22, "Enebrel", "Sam", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(23, "Hydralazine", "Christoff", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(24, "Combivent", "Janet", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
dtDetails.Rows.Add(25, "Dilantin", "Melanie", DateTime.Now, "Casuality", "Cash", "Pending", "Kolkatta");
if (!IsPostBack)
{
grdDetails.DataSource = dtDetails;
grdDetails.DataBind();
}
}
protected void ExportToGrid(object sender, EventArgs e)
{
ExportToGrid(dtDetails);
}
private void ExportToGrid(DataTable dt)
{
if (dt.Rows.Count > 0)
{
string filename = "Avinash" + ".xls";
using (System.IO.StringWriter tw = new System.IO.StringWriter())
{
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
GridView dgGrid = new GridView();
dgGrid.DataSource = dt;
dgGrid.RowDataBound += new GridViewRowEventHandler(Grd_QADetails_RowDataBound);
dgGrid.DataBind();
//Get the HTML for the control.
dgGrid.RenderControl(hw);
//Write the HTML back to the browser.
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + filename + "");
this.EnableViewState = false;
Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=utf-8\">" + Environment.NewLine);
Response.Write(tw.ToString());
Response.Write("</body>");
Response.Write("</html>");
Response.End();
}
}
}
}![enter image description here][1]
}
