ASP.NET-C#: Inserting const into TextBox in Gridview
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05-07-2021 - |
문제
I have some problems inserting a const "1" into a textbox which is gridview.
The gridview code:
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" EnableViewState="False">
<Columns>
<asp:BoundField DataField="Price" HeaderText="Price" ItemStyle-CssClass="price" >
<ItemStyle CssClass="price"></ItemStyle>
</asp:BoundField>
<asp:TemplateField HeaderText="ProductID">
<ItemTemplate>
<asp:Label ID="lblID" runat="server" Text='<%# Eval("ProductID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ProductName">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%# Eval("ProductName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Summary">
<ItemTemplate>
<asp:Label ID="lblSum" runat="server" Text='<%# Eval("Summary") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="picPath">
<ItemTemplate>
<asp:Label ID="lblPic" runat="server" Text='<%# Eval("picPath") %>' ></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText = "quantity">
<ItemTemplate>
<asp:TextBox ID="lblquantity" runat="server" ></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText = "Total">
<ItemTemplate>
<asp:Label ID="lblTotal" runat="server" ></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
All the information is populated from the session of the previous page, beside this textbox which doesn't comes from anywhere, it's a quantity textbox which the user should enter. And I want it to have a default value of "1".
I don't actually know how to insert into a textbox which is in the gridview.
Please help me.
Thanks
해결책
<asp:TemplateField HeaderText = "quantity">
<ItemTemplate>
<asp:TextBox ID="lblquantity" runat="server" Text='<%# Eval("quantity") == DBNull.Value ? "1" : Eval("quantity").ToString()' ></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
if quantity value is null in the table, then Text property will be default 1. Otherwise it will be quantity column in the table.
다른 팁
This may be because code is also checking for Header and footer template..
just put a null check before settings value...
TextBox tb = (TextBox)e.Row.FindControl("lblquantity");
if(tb!=null)
tb.Text = Convert.ToString(123);
This will surely work...
You can put chis code in your GridView's RowDataBound event...
TextBox tb = (TextBox)e.Row.FindControl("lblquantity");
tb.Text = Convert.ToString(123);
I hope this helps...