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Validate date in code behind with regex – VB.NET

Code behind ‘define public var Protected StartDate As String Protected EndDate As String ‘define other var Dim sDate = Request.Form(“startDateTbx”) Dim eDate = Request.Form(“endDateTbx”) Dim r As Regex r = New Regex(“^(0[1-9]|[1-9]|1[012])/(0[1-9]|[1-9]|[12][0-9]|3[01])/20\d\d$”) ‘run validation If sDate = “” Then startDateLbl.Text = “Required” ElseIf Not r.Match(sDate).Success Then startDateLbl.Text = “Invalid date. Use mm/dd/yyyy.” Else startDateLbl.Text = […]

Add item on the dropdownlist – VB.NET

Markup page <!– ‘define control –> <asp:DropDownList ID=”MySelectionDDL” runat=”server” AutoPostBack=”True” AppendDataBoundItems=”true” DataSourceID=”MySelectionDS” DataTextField=”Text” DataValueField=”Value” OnDataBound=”MySelectionDDL_DataBound”> <!– ‘define datasource –> <asp:SqlDataSource ID=”MySelectionDS” runat=”server” ConnectionString=”< %$ ConnectionStrings:my_sql_connection %>” SelectCommand=”SELECT [Text], [Value] FROM [MyTable] ORDER BY [Text]”> </asp:SqlDataSource> Code behind Protected Sub MySelectionDDLDataBound(ByVal sender As Object, ByVal e As EventArgs) ‘add item at the beginning of the list […]

Define control properties in code behind located inside gridview or formview

Markup page <asp:FormView ID=”DefaultPhoto” runat=”server” DataKeyNames=”ge_id” DataSourceID=”ListPhotosDS”> <EditItemTemplate> <img src=”/images/< %# Container.DataItem("photo") %>” class=”detailsmallphoto”/> <asp:Label ID=”photo_idLabel” runat=”server” Text=’< %# Eval("photo_id") %>‘ Visible=”false” /> <asp:LinkButton ID=”UpdateButton” runat=”server” OnClientClick=”return confirm(‘Are you sure you want to remove this photo?’);” CommandName=”Update” /> </EditItemTemplate> </asp:FormView> Code behind DirectCast(DefaultPhoto.FindControl(“UpdateButton”), LinkButton).Text = “Remove” If Page.isPostBack Then DirectCast(DefaultPhoto.FindControl(“UpdateButton”), LinkButton).Text = “Add Photo” End […]