Read and display contents of Text file (.txt) in ASP.Net using C# and VB.Net

Hi wikfry,

Refer the below sample.

HTML

<asp:GridView ID="GridView1" runat="server" ShowHeader="false" Font-Bold="true" Font-Size="37px"
    RowStyle-Font-Names="Calibri" RowStyle-ForeColor="White" RowStyle-BackColor="Red"
    RowStyle-BorderStyle="None" RowStyle-BorderColor="Red" CellPadding="0" OnRowDataBound="Gridview1_OnRowDataBound">
</asp:GridView>

VB.Net

Shared lastWriteTime As DateTime
Shared lines As String()
Private i As Integer = 0
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
    lastWriteTime = File.GetLastWriteTime(Server.MapPath("~/App_Data/benutzermb.txt"))
    lines = File.ReadAllLines(Server.MapPath("~/App_Data/benutzermb.txt"))
    Dim dt As New DataTable()
    dt.Columns.Add(New DataColumn("Data", System.Type.[GetType]("System.String")))
    For i As Integer = 0 To lines.Length - 1
        Dim dr As DataRow = dt.NewRow()
        dr("Data") = "Benutzer" + " " + "wielkość" + " " + lines(i) + " " + "MB"
        dt.Rows.Add(dr)
        dr = dt.NewRow()
        dr("Data") = lastWriteTime
        dt.Rows.Add(dr)
    Next
    GridView1.DataSource = dt
    GridView1.DataBind()
End Sub
Protected Sub Gridview1_OnRowDataBound(sender As Object, e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        e.Row.Cells(0).ForeColor = System.Drawing.Color.White
        Dim line As String = If(e.Row.RowIndex Mod 2 <> 0, lines(i), "")
        If e.Row.RowIndex Mod 2 <> 0 Then
            If Convert.ToInt32(line) <= 500 Then
                e.Row.Cells(0).BackColor = System.Drawing.Color.Red
            ElseIf Convert.ToInt32(line) >= 501 AndAlso Convert.ToInt32(line) <= 1500 Then
                e.Row.Cells(0).BackColor = System.Drawing.Color.Orange
            Else
                e.Row.Cells(0).BackColor = System.Drawing.Color.Green
            End If
            i += 1
        End If
    End If
End Sub

C#

static DateTime lastWriteTime;
static string[] lines;
int i = 0;
protected void Page_Load(object sender, System.EventArgs e)
{
    lastWriteTime = File.GetLastWriteTime(Server.MapPath("~/App_Data/benutzermb.txt"));
    lines = File.ReadAllLines(Server.MapPath("~/App_Data/benutzermb.txt"));
    DataTable dt = new DataTable();
    dt.Columns.Add(new DataColumn("Data", System.Type.GetType("System.String")));
    for (int i = 0; i < lines.Length; i++)
    {
        DataRow dr = dt.NewRow();
        dr["Data"] = "Benutzer" + " " + "wielkość" + " " + lines[i] + " " + "MB";
        dt.Rows.Add(dr);
        dr = dt.NewRow();
        dr["Data"] = lastWriteTime;
        dt.Rows.Add(dr);
    }
    GridView1.DataSource = dt;
    GridView1.DataBind();
}
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 (Convert.ToInt32(line) <= 500)
            {
                e.Row.Cells[0].BackColor = System.Drawing.Color.Red;
            }
            else if (Convert.ToInt32(line) >= 501 && Convert.ToInt32(line) <= 1500)
            {
                e.Row.Cells[0].BackColor = System.Drawing.Color.Orange;
            }
            else
            {
                e.Row.Cells[0].BackColor = System.Drawing.Color.Green;
            }
            i++;
        }
    }
}

txt file record

500

501

1500

1501

Output