how to add validation in gridview textbox?

Question

<asp:TemplateField HeaderText="Quantity">
    <ItemTemplate>
        <asp:Label ID="lbl_quantity" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"quantity") %>'>
        </asp:Label>

    </ItemTemplate>

    <EditItemTemplate>
        <asp:TextBox runat="server" ID="txtquantity" Width="90px" onkeypress="return validatenumerics(event);" Text='<%# DataBinder.Eval(Container.DataItem,"quantity") %>'></asp:TextBox>
        <asp:RequiredFieldValidator ID="RFquantity" runat="server" ControlToValidate="txtquntity" Display="None" ErrorMessage="This field is required value" ValidationGroup="quantity">
        </asp:RequiredFieldValidator>
        <ajaxToolkit:ValidatorCalloutExtender ID="VCquantity" runat="Server" TargetControlID="RFquantity"/>

    </EditItemTemplate>
</asp:TemplateField>

I want to shows an javascript message , if text box is empty..i tried this code. for validation purpose required field validation is added.then "edit" button is not fired..please help me.

This is my grid with edit ,update ,cancel and cancel button

  protected void gvproducts_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
    gvproducts.EditIndex = -1;
    grid();

}
protected void gvproducts_RowEditing(object sender, GridViewEditEventArgs e)
{
    gvproducts.EditIndex = e.NewEditIndex;
    grid();
}
protected void gvproducts_RowUpdating(object sender, GridViewUpdateEventArgs e)
{

    TextBox txtquantity = (TextBox)gvproducts.Rows[e.RowIndex].Cells[4].Controls[1];

    int st = Convert.ToInt32(gvproducts.DataKeys[e.RowIndex].Values[0].ToString());


    objsupplyPL.quantity = Convert.ToInt32(txtquantity.Text.ToString());

    objsupplyPL.sno = st;
    DataTable scmpurchase = new DataTable();
    scmpurchase = objsupplyBAL.updatepurchase(objsupplyPL);

    ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "UpdateDetails", "alert('Update Successful');", true);
    gvproducts.EditIndex = -1;
    grid();
}

possible duplicate of Adding a validator to the gridview textbox, created in edit-mode of a bound field — Ramesh Rajendran
– Ramesh Rajendran, Commented Oct 17, 2013 at 12:25

Hans Derks · Accepted Answer · 2013-10-17 11:06:03Z

1

What you could do is add a ValidationSummery with ShowMessageBox and a ValidationGroup just above the GridView

<asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="true" ShowSummary="false" ValidationGroup="quantity" />

And change the TemplateField to this (make sure EnableClientScript=true) and make sure the EditButton has same validationgroup

<asp:TemplateField HeaderText="Quantity">
    <ItemTemplate>
        <asp:Label ID="lbl_quantity" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"quantity") %>' />
    </ItemTemplate>
    <EditItemTemplate>
        <asp:TextBox runat="server" ID="txtquantity" Width="90px" Text='<%# DataBinder.Eval(Container.DataItem,"quantity") %>' ValidationGroup="quantity"  />
        <asp:RequiredFieldValidator ID="RFquantity" runat="server" ControlToValidate="txtquantity" EnableClientScript="true"  Display="None" ErrorMessage="This field is required value" ValidationGroup="quantity" />
    </EditItemTemplate>
</asp:TemplateField>        
<asp:CommandField ShowEditButton="True" ValidationGroup="quantity" />

answered Oct 17, 2013 at 11:06

Hans Derks

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2 Comments

Sambasiva Over a year ago

I added validation summary as you like...but it's not effect edit button

Hans Derks Over a year ago

How does your EditButton declaration looks like?

László Papp · Accepted Answer · 2014-02-09 18:56:39Z

1

just add a class to your TextBox and find the control using class finder with jquery. Then, you can check whether the TextBox.val() is empty or not using the javascript function.

edited Feb 9, 2014 at 18:56

László Papp

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answered Feb 9, 2014 at 18:38

user3290298

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