Required field validater in repeater - asp.net

Question

I have a repeater control and textbox in that repeater. I want a required field validator in the textbox ho can i do this

Answer 1

<asp:Repeater id="myRep" OnItemDataBound="rep_ItemDataBound" runat="server">
<ItemTemplate>
<asp:TextBox id="tx" runat="server" />
<asp:RequiredFieldValidator id="myVal" ControlToValidate="tx" ErrorMessage="Required" runat="server" />
</ItemTemplate>
</asp:Repeater>
UPDATE
Add this to code-behind (also modify the markup a bit to subscribe to an event, see above):
protected void rep_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
RequiredFieldValidator val = (RequiredFieldValidator)e.Item.FindControl("myVal");
TextBox tb = (TextBox)e.Item.FindControl("tx");
val.ControlToValidate = tb.ID;
}

Answer 2

If you want all textboxes in a repeater to be validated by a single button click then thats simple like this
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<asp:TextBox ID="txt" runat="server">
</asp:TextBox>
<asp:RequiredFieldValidator ID="rqf" ControlToValidate="txt"
ErrorMessage="*" ValidationGroup = "TestValidationGroup" runat = "server">
</asp:RequiredFieldValidator>
</ItemTemplate>
</asp:Repeater>
<asp:Button ID = "btnSubmit" runat = "server" ValidationGroup = "TestValidationGroup" />
No need to check for any event for databound or anything.

Answer 3

You can set ControlToValidate value on repeater itemdatabound.

Answer 4

Try this one
<asp:Repeater ID="rptSample" runat="server">
<ItemTemplate>
Name:<br />
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" ControlToValidate="txtName" runat="server" Display="Static" ErrorMessage="Name field cannot be left blank"></asp:RequiredFieldValidator>
</ItemTemplate>
</asp:Repeater>
<br />
<asp:Button ID="btnSubmit" Text="Submit" runat="server" />

Answer 5

protected void myRep_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
((RequiredFieldValidator)e.Item.FindControl("myVal")).ValidationGroup = ((TextBox)e.Item.FindControl("tx")).UniqueID;
}
}

Answer 6

protected void Repeater_OnItemDataBound(object sender, RepeaterItemEventArgs e) {
tblData tbldata = e.Item.DataItem as tblData;
RequiredFieldValidator val = (RequiredFieldValidator)e.Item.FindControl("rfv");
if (tbldata.FieldName.ToUpper().Contains("NOT NULL")) {
TextBox tb = (TextBox)e.Item.FindControl("txtDATFieldName");
val.ControlToValidate = tb.ID;
}
else {
val.Enabled = false; // disable when you dont need a validator
}
}

Answer 7

Maybe you want have a validation per row... Set the validation group to a group per row like this
ValidationGroup='<%# "gropname" + Eval("Id") %>'
do this in the validator, textbox and the button
HTH
G.

Answer 8

I kept getting a duplicate key exception in RegisterExpandoAttribute trying to do this.
I was using a UserControl inside a repeater, when "OnDataBinding" instead of "ItemDataBinding"
This worked for me:
/// <summary>
/// Raises the <see cref="E:System.Web.UI.Control.DataBinding" /> event.
/// </summary>
/// <param name="e">An <see cref="T:System.EventArgs" /> object that contains the event data.</param>
protected override void OnDataBinding(EventArgs e)
{
base.OnDataBinding(e);
foreach (Control ct in this.Controls)
{
BaseValidator bv = ct as BaseValidator;
if (null == bv)
{
continue;
}
bv.ControlToValidate = this.FindControl(bv.ControlToValidate).ID;
bv.ValidationGroup = this.ValidationGroup;
}
}
And yes, I don't think it makes any sense either