Read and display two text files data in different ASP.Net GridView using C#

Hi indradeo,

Refer below code.

HTML

<table border="1" style="width: 73%;">
    <tr>
        <td class="auto-style5" colspan="2"><strong>CEMS Real Time Generation Data</strong></td>
    </tr>
    <tr>
        <td class="auto-style6">
            <asp:GridView ID="GridView1" runat="server" ShowHeader="false" Font-Bold="true" Font-Size="15px" OnDataBound="OnDataBound1"
                RowStyle-Font-Names="Calibri" RowStyle-ForeColor="White" RowStyle-BackColor="#2514"
                RowStyle-BorderStyle="None" RowStyle-BorderColor="Red" CellPadding="0" OnRowDataBound="Gridview1_OnRowDataBound" CssClass="auto-style1" Width="285px" Height="123px">
                <RowStyle BackColor="#002514" BorderColor="Red" BorderStyle="None" Font-Names="Calibri" ForeColor="White"></RowStyle>
            </asp:GridView>
        </td>
        <td class="auto-style7">
            <asp:GridView ID="GridView2" runat="server" ShowHeader="false" Font-Bold="true" Font-Size="15px" OnDataBound="OnDataBound2"
                RowStyle-Font-Names="Calibri" RowStyle-ForeColor="White" RowStyle-BackColor="#2514"
                RowStyle-BorderStyle="None" RowStyle-BorderColor="Red" CellPadding="0" OnRowDataBound="Gridview1_OnRowDataBound" CssClass="auto-style1" Width="286px" Height="123px">
                <RowStyle BackColor="#002514" BorderColor="Red" BorderStyle="None" Font-Names="Calibri" ForeColor="White"></RowStyle>
            </asp:GridView>
        </td>
    </tr>
</table>

Namespaces

using System.Data;
using System.Net;
using System.Drawing;

Code

static string[] lines;
int i = 0;

protected void Page_Load(object sender, EventArgs e)
{
    string textFromFile = (new WebClient()).DownloadString("file://10.1.150.248/display%20board/STACK1UNIT1.txt");
    GridView1.DataSource = GetDataFromText(textFromFile);
    GridView1.DataBind();

    textFromFile = (new WebClient()).DownloadString("file://10.1.150.248/display%20board/STACK1UNIT2.txt");
    GridView2.DataSource = GetDataFromText(textFromFile);
    GridView2.DataBind();
}

private DataTable GetDataFromText(string textFromFile)
{
    lines = textFromFile.Split('\n');
    DataTable dt = new DataTable();
    dt.Columns.Add(new DataColumn("Data", System.Type.GetType("System.String")));
    for (int i = 0; i < lines.Length; i++)
    {
        dt.Rows.Add(lines[i]);
    }

    return dt;
}
protected void Gridview1_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        e.Row.Cells[0].ForeColor = System.Drawing.Color.White;
        string line = e.Row.RowIndex % 2 != 0 ? lines[i] : "";
        if (e.Row.RowIndex % 2 != 0)
        {
            if (line.Length <= 200)
            {
                e.Row.Cells[0].BackColor = System.Drawing.Color.Red;
            }
            else if (line.Length >= 100 && line.Length <= 0)
            {
                e.Row.Cells[0].BackColor = System.Drawing.Color.Orange;
            }
            else
            {
                e.Row.Cells[0].BackColor = System.Drawing.Color.Green;
            }
        }
        i++;
    }
}
protected void OnDataBound1(object sender, EventArgs e)
{
    GridViewRow row = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);
    TableHeaderCell cell = new TableHeaderCell();
    cell.Text = "UNIT#1";
    cell.ColumnSpan = 2;
    row.Controls.Add(cell);
    row.BackColor = ColorTranslator.FromHtml("#3AC0F2");
    GridView1.HeaderRow.Parent.Controls.AddAt(0, row);
}

protected void OnDataBound2(object sender, EventArgs e)
{
    GridViewRow row = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);
    TableHeaderCell cell = new TableHeaderCell();
    cell.Text = "UNIT#2";
    cell.ColumnSpan = 2;
    row.Controls.Add(cell);
    row.BackColor = ColorTranslator.FromHtml("#3AC0F2");
    GridView1.HeaderRow.Parent.Controls.AddAt(0, row);
}

Output