Change ASP.Net Repeater Item Text based on condition using C# and VB.Net

Hi Tevin,

Repeater has ItemDataBound event same as Gridview RowDataBound event.

But ItemDataBound occurs after an item in the Repeater control is data bound but before it is rendered on the page.

So to implement this you have two option.

1. Using ItemCreated event.

2. Using protected method.

I have created a sample please take its reference.

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

1. Using ItemCreated event

HTML

<asp:Repeater ID="Repeater1" runat="server" OnItemCreated="Repeater1_ItemCreated">
    <HeaderTemplate>
        <table>
            <tr>
                <th>Id</th>
                <th>Name</th>
                <th>Status</th>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td><%#DataBinder.Eval(Container.DataItem, "Id")%></td>
            <td><%#DataBinder.Eval(Container.DataItem, "Name")%></td>
            <td><%#DataBinder.Eval(Container.DataItem, "Status")%></td>
        </tr>
    </ItemTemplate>
    <FooterTemplate>
        </table>
    </FooterTemplate>
</asp:Repeater>

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("Id", typeof(string)));
        dt.Columns.Add(new DataColumn("Name", typeof(string)));
        dt.Columns.Add(new DataColumn("Status", typeof(string)));
        dt.Rows.Add(1, "John Hammond", "True");
        dt.Rows.Add(2, "Mudassar Khan", "False");
        dt.Rows.Add(3, "Suzanne Mathews", "True");
        dt.Rows.Add(4, "Robert Schidner", "False");
        this.Repeater1.DataSource = dt;
        this.Repeater1.DataBind();
    }
}

protected void Repeater1_ItemCreated(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        RepeaterItem item = e.Item;
        DataRow dr = (item.DataItem as DataRowView).Row;
        string status = dr["Status"].ToString();
        if (status.ToLower().Trim() == "true")
        {
            dr["Status"] = "Abnormal";
        }
        else
        {
            dr["Status"] = "Normal";
        }
    }
}

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.Add(New DataColumn("Id", GetType(String)))
        dt.Columns.Add(New DataColumn("Name", GetType(String)))
        dt.Columns.Add(New DataColumn("Status", GetType(String)))
        dt.Rows.Add(1, "John Hammond", "True")
        dt.Rows.Add(2, "Mudassar Khan", "False")
        dt.Rows.Add(3, "Suzanne Mathews", "True")
        dt.Rows.Add(4, "Robert Schidner", "False")
        Me.Repeater1.DataSource = dt
        Me.Repeater1.DataBind()
    End If
End Sub

Protected Sub Repeater1_ItemCreated(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
    If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim item As RepeaterItem = e.Item
        Dim dr As DataRow = (TryCast(item.DataItem, DataRowView)).Row
        Dim status As String = dr("Status").ToString()

        If status.ToLower().Trim() = "true" Then
            dr("Status") = "Abnormal"
        Else
            dr("Status") = "Normal"
        End If
    End If
End Sub

2. Using protected method

HTML

<asp:Repeater ID="Repeater1" runat="server">
    <HeaderTemplate>
        <table border="0" cellpadding="0" cellspacing="0">
            <tr>
                <th>Id</th>
                <th>Name</th>
                <th>Status</th>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
        <tr>
            <td><%#DataBinder.Eval(Container.DataItem, "Id")%></td>
            <td><%#DataBinder.Eval(Container.DataItem, "Name")%></td>
            <td><%# SetText(DataBinder.Eval(Container.DataItem, "Status").ToString()) %></td>
        </tr>
    </ItemTemplate>
    <FooterTemplate>
        </table>
    </FooterTemplate>
</asp:Repeater>

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("Id", typeof(string)));
        dt.Columns.Add(new DataColumn("Name", typeof(string)));
        dt.Columns.Add(new DataColumn("Status", typeof(string)));
        dt.Rows.Add(1, "John Hammond", "True");
        dt.Rows.Add(2, "Mudassar Khan", "False");
        dt.Rows.Add(3, "Suzanne Mathews", "True");
        dt.Rows.Add(4, "Robert Schidner", "False");
        this.Repeater1.DataSource = dt;
        this.Repeater1.DataBind();
    }
}

protected string SetText(string item)
{
    if (item.ToLower().Trim() == "true")
    {
        return "Abnormal";
    }
    else
    {
        return "Normal";
    }
}

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.Add(New DataColumn("Id", GetType(String)))
        dt.Columns.Add(New DataColumn("Name", GetType(String)))
        dt.Columns.Add(New DataColumn("Status", GetType(String)))
        dt.Rows.Add(1, "John Hammond", "True")
        dt.Rows.Add(2, "Mudassar Khan", "False")
        dt.Rows.Add(3, "Suzanne Mathews", "True")
        dt.Rows.Add(4, "Robert Schidner", "False")
        Me.Repeater1.DataSource = dt
        Me.Repeater1.DataBind()
    End If
End Sub

Protected Function SetText(ByVal item As String) As String
    If item.ToLower().Trim() = "true" Then
        Return "Abnormal"
    Else
        Return "Normal"
    End If
End Function

Screenshot