Set Background Color of Table Cell based on condition in ASP.Net from Code Behind

Hi ramco1917,

Please refer below sample code.

HTML

<asp:Literal ID="ltTable" runat="server" />

CSS

.primary { background-color: dodgerblue; }
.danger { background-color: red; }

Code

CS

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id"), new DataColumn("Name"), new DataColumn("Status") });
        dt.Rows.Add(1, "John Hammond", "Active");
        dt.Rows.Add(2, "Mudassar Khan", "Inactive");
        dt.Rows.Add(3, "Suzanne Mathews", "Active");
        dt.Rows.Add(4, "Robert Schidner", "Inactive");

        StringBuilder sb = new StringBuilder();
        //Table start.
        sb.Append("<table>");

        //Adding HeaderRow.
        sb.Append("<tr>");
        foreach (DataColumn column in dt.Columns)
        {
            sb.Append("<th>" + column.ColumnName + "</th>");
        }
        sb.Append("</tr>");


        //Adding DataRow.
        foreach (DataRow row in dt.Rows)
        {
            sb.Append("<tr>");
            foreach (DataColumn column in dt.Columns)
            {
                if (column.ColumnName == "Status")
                {
                    if (row[column.ColumnName].ToString().ToLower() == "active")
                    {
                        sb.Append("<td class='primary'>" + row[column.ColumnName].ToString() + "</td>");
                    }
                    else
                    {
                        sb.Append("<td class='danger'>" + row[column.ColumnName].ToString() + "</td>");
                    }
                }
                else
                {
                    sb.Append("<td>" + row[column.ColumnName].ToString() + "</td>");
                }

            }
            sb.Append("</tr>");
        }

        //Table end.
        sb.Append("</table>");
        ltTable.Text = sb.ToString();
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As DataTable = New DataTable()
        dt.Columns.AddRange(New DataColumn(2) {New DataColumn("Id"), New DataColumn("Name"), New DataColumn("Status")})
        dt.Rows.Add(1, "John Hammond", "Active")
        dt.Rows.Add(2, "Mudassar Khan", "Inactive")
        dt.Rows.Add(3, "Suzanne Mathews", "Active")
        dt.Rows.Add(4, "Robert Schidner", "Inactive")
        Dim sb As StringBuilder = New StringBuilder()
        sb.Append("<table>")
        sb.Append("<tr>")

        For Each column As DataColumn In dt.Columns
            sb.Append("<th>" & column.ColumnName & "</th>")
        Next
        sb.Append("</tr>")

        For Each row As DataRow In dt.Rows
            sb.Append("<tr>")
            For Each column As DataColumn In dt.Columns
                If column.ColumnName = "Status" Then
                    If row(column.ColumnName).ToString().ToLower() = "active" Then
                        sb.Append("<td class='primary'>" & row(column.ColumnName).ToString() & "</td>")
                    Else
                        sb.Append("<td class='danger'>" & row(column.ColumnName).ToString() & "</td>")
                    End If
                Else
                    sb.Append("<td>" & row(column.ColumnName).ToString() & "</td>")
                End If
            Next
            sb.Append("</tr>")
        Next
        sb.Append("</table>")
        ltTable.Text = sb.ToString()
    End If
End Sub

Screenshot