Bind CheckBoxList and Set Selected Items using C# and VB.Net

Hi ,

Please refer below sample.

Note: For this sample i have used temporary DataTable. For more details refer How to create Temporary Table in ASP.Net using C# and VB.Net.

HTML

<asp:CheckBoxList ID="chkCutomers" runat="server"> 
</asp:CheckBoxList>

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[] {
                            new DataColumn("Id", typeof(int)),
                            new DataColumn("Name", typeof(string))
        });

        dt.Rows.Add(1, "John Hammond");
        dt.Rows.Add(2, "Mudassar Khan");
        dt.Rows.Add(3, "Suzanne Mathews");
        dt.Rows.Add(4, "Robert Schidner");
        this.chkCutomers.DataSource = dt;
        this.chkCutomers.DataTextField = "Name";
        this.chkCutomers.DataValueField = "Id";
        this.chkCutomers.DataBind();

        string[] ids = new string[] { "1", "4", "3" };
        foreach (ListItem item in chkCutomers.Items)
        {
            if (ids.Contains(item.Value))
            {
                item.Selected = true;
            }
        }
    }
}

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() {New DataColumn("Id", GetType(Integer)), New DataColumn("Name", GetType(String))})
        dt.Rows.Add(1, "John Hammond")
        dt.Rows.Add(2, "Mudassar Khan")
        dt.Rows.Add(3, "Suzanne Mathews")
        dt.Rows.Add(4, "Robert Schidner")
        Me.chkCutomers.DataSource = dt
        Me.chkCutomers.DataTextField = "Name"
        Me.chkCutomers.DataValueField = "Id"
        Me.chkCutomers.DataBind()
        Dim ids As String() = New String() {"1", "4", "3"}

        For Each item As ListItem In chkCutomers.Items

            If ids.Contains(item.Value) Then
                item.Selected = True
            End If
        Next
    End If
End Sub

Screenshot

Got the logic! I solve my array that comes in the sequence 1|24|12|56  I solved it this way!

string ids_servicos = dtEmp.Rows[0]["emp_servicos"].ToString(); // Format 1|24|12
string[] ids = ids_servicos.Split('|');