Get ASP.Net TextBox value in Code behind when TextMode is DateTimeLocal using C# and VB.Net

Hi ronaldlour,

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. How to create Temporary Table in ASP.Net using C# and VB.Net

HTML

<asp:DataList ID="dlSchedule" runat="server" RepeatColumns="4" CellPadding="4" >
    <ItemTemplate>
        <table class="">
            <tr class="inputtr">
                <td>
                    <div>
                        <div id="Div43" runat="server">
                            <asp:Button CssClass="btn" ID="btnSchedule" runat="server" Text="Schedule" CommandArgument="Schedule" OnClick="Schedule" />
                        </div>
                    </div>
                    <div>
                        <div id="Div44" runat="server">
                            <asp:Button CssClass="btn" ID="btnReSchedule" runat="server" Text="ReSchedule" CommandArgument="Reschedule" OnClick="Schedule" OnClientClick="return confirm('Are you sure you want to ReSchedule? This will delete previous Schedule.');" />
                        </div>
                    </div>
                </td>
                <td>
                    <div>
                        <div>
                            <asp:TextBox ID="txtDateTime" runat="server" placeholder="dd/mm/yyyy" TextMode="DateTimeLocal" ReadOnly="false"></asp:TextBox>
                        </div>
                    </div>
                    <div>
                        <div id="Div42" runat="server">
                            <asp:TextBox ID="txtSchedule" runat="server" Enabled="false" ReadOnly="false" value='<%# Eval("Schedule")%>'></asp:TextBox>
                        </div>
                    </div>
                </td>
            </tr>
        </table>
    </ItemTemplate>
</asp:DataList>

Namespace

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

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

protected void Schedule(object sender, EventArgs e)
{
    Button btnSelect = sender as Button;
    string commandArgs = btnSelect.CommandArgument;
    if (commandArgs.ToLower() == "schedule")
    {
        TextBox txtDateTime = btnSelect.Parent.Parent.FindControl("txtDateTime") as TextBox;
        ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('" + txtDateTime.Text.Replace("T", " ") + "');", true);
    }
    else if (commandArgs.ToLower() == "reschedule")
    {
    }
}

private void BindDataList()
{
    DataTable dt = new DataTable();
    dt.Columns.Add(new DataColumn("Schedule"));
    dt.Rows.Add("03/06/2022");
    dlSchedule.DataSource = dt;
    dlSchedule.DataBind();
}

VB.Net

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

Protected Sub Schedule(ByVal sender As Object, ByVal e As EventArgs)
    Dim btnSelect As Button = TryCast(sender, Button)
    Dim commandArgs As String = btnSelect.CommandArgument

    If commandArgs.ToLower() = "schedule" Then
        Dim txtDateTime As TextBox = TryCast(btnSelect.Parent.Parent.FindControl("txtDateTime"), TextBox)
        ClientScript.RegisterStartupScript(Me.[GetType](), "alert", "alert('" & txtDateTime.Text.Replace("T", " ") & "');", True)
    ElseIf commandArgs.ToLower() = "reschedule" Then
    End If
End Sub

Private Sub BindDataList()
    Dim dt As DataTable = New DataTable()
    dt.Columns.Add(New DataColumn("Schedule"))
    dt.Rows.Add("03/06/2022")
    dlSchedule.DataSource = dt
    dlSchedule.DataBind()
End Sub

Screenshot