Change dynamically generated ASP.Net GridView cell Text Color using C# and VB.Net

Hey SamMyat,

Please refer below sample.

HTNL

<div>
    <asp:Panel ID="PanelResult" runat="server">
    </asp:Panel>
</div>

Namespaces

C#

using System.Data;
using System.Drawing;

VB.Net

Imports System.Data
Imports System.Drawing

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Bind_GridView();
    }
}

private void Bind_GridView()
{
    DataSet ds = new DataSet();
    int j = 0;
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] { new DataColumn("Consumer Name", typeof(string)), new DataColumn("Buying Count No", typeof(int)) });
    dt.Rows.Add("James", 12);
    dt.Rows.Add("Marry", -13);
    ds.Tables.Add(dt);

    dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] { new DataColumn("Consumer Name", typeof(string)), new DataColumn("Buying Count No", typeof(int)) });
    dt.Rows.Add("James", -12);
    dt.Rows.Add("Marry", 13);
    ds.Tables.Add(dt);
    if (ds.Tables.Count > 0)
    {
        for (int i = 0; i < ds.Tables.Count; i++)
        {
            j = i + 1;
            GridView objGV = new GridView();
            objGV.ID = "ResultDG" + j;
            objGV.AutoGenerateColumns = true;
            objGV.RowDataBound += new GridViewRowEventHandler(objGV_RowDataBound);
            objGV.DataSource = ds.Tables[i];
            objGV.DataBind();
            PanelResult.Controls.Add(objGV);
        }
    }
}

void objGV_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        int id = Convert.ToInt32(e.Row.Cells[1].Text);
        if (id > 0)
        {
            e.Row.Cells[1].ForeColor = Color.Green;
        }
        else
        {
            e.Row.Cells[1].Text = Math.Abs(id).ToString();
            e.Row.Cells[1].ForeColor = Color.Red;
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Bind_GridView()
    End If
End Sub

Private Sub Bind_GridView()
    Dim ds As DataSet = New DataSet()
    Dim j As Integer = 0
    Dim dt As DataTable = New DataTable()
    dt.Columns.AddRange(New DataColumn() {New DataColumn("Consumer Name", GetType(String)), New DataColumn("Buying Count No", GetType(Integer))})
    dt.Rows.Add("James", 12)
    dt.Rows.Add("Marry", -13)
    ds.Tables.Add(dt)
    dt = New DataTable()
    dt.Columns.AddRange(New DataColumn() {New DataColumn("Consumer Name", GetType(String)), New DataColumn("Buying Count No", GetType(Integer))})
    dt.Rows.Add("James", -12)
    dt.Rows.Add("Marry", 13)
    ds.Tables.Add(dt)
    If ds.Tables.Count > 0 Then
        For i As Integer = 0 To ds.Tables.Count - 1
            j = i + 1
            Dim objGV As GridView = New GridView()
            objGV.ID = "ResultDG" & j
            objGV.AutoGenerateColumns = True
            AddHandler objGV.RowDataBound, AddressOf objGV_RowDataBound
            objGV.DataSource = ds.Tables(i)
            objGV.DataBind()
            PanelResult.Controls.Add(objGV)
        Next
    End If
End Sub

Private Sub objGV_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        Dim id As Integer = Convert.ToInt32(e.Row.Cells(1).Text)
        If id > 0 Then
            e.Row.Cells(1).ForeColor = Color.Green
        Else
            e.Row.Cells(1).Text = Math.Abs(id).ToString()
            e.Row.Cells(1).ForeColor = Color.Red
        End If
    End If
End Sub

Screenshot