why we use HIDDENFILED Controller in asp.net

KRayudu V

13y1.4k.NET

Hi,

Im bit confusing while using HIDDENFILED Controller in asp.net.why we use HIDDENFILED Controller in Gridview.

6 Replies

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Iftikar Hussain13y ago
Accepted answer
Hi,
The HiddenField control is used to store a value. It is rendered element. View state, session state and cookies are used to maintain the state of a web forms page. You can use HiddenField instead of view state, session state and cookies.

Regards,
Iftikar
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Sanjeeb Lenka13y ago
hi,

share your aspx and cs code. we will check that.
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KRayudu V13y ago

I have a GridView defined as follows:

 ID="myGridView" AutoGenerateColumns="false" runat="server" OnLoad="myGridView_Load" OnRowCommand="myGridView_Command" OnRowEditing="myGridView_RowEditing" OnRowDeleting="myGridView_RowDeleting" DataKeyNames="ID" >          DataField="ID" Visible="false" />      DataField="BirthDate" Visible="false" />      DataField="FirstName" HeaderText="First Name" />      DataField="LastName" HeaderText="Last Name" />      HeaderText="Other">                 ID="editLB" runat="server" Text="edit" CommandName="Edit" />          ID="deleteLB" runat="server" Text="delete" CommandName="Delete" />                   


When a user clicks the edit button, I need to get the value of the BirthDate column. To attempt this, I have tried the following:

protected void myGridView_RowEditing(object sender, GridViewEditEventArgs e) {   GridViewRow row = gvUsers.Rows[e.NewEditIndex];   DateTime birthDate = (DateTime)(row.Cells[1].Text);    // Does not work }

I know it has something to do with the fact that the column is not visible. The column must be hidden. But I need to get that value— how can I do this?

Sanjeeb Lenka13y ago
hi,

Hiddenfield control used to store value . and it will not shown to user in design but you can use it in that page in client side. you can use hiddenfield instead of viewstate. the hiddenfield value is only available for that page where it placed not in all the pages.
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Anurag Sarkar13y ago
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hiddenfield.value.aspx http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hiddenfield.value.aspx http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hiddenfield.value.aspx http://www.dotnetfunda.com/tutorials/controls/hiddenfield.aspx
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KRayudu V13y ago
.why we use HIDDENFILED Controller in Gridview TemplateField(ItemTemplate) like this

and we will access this Controler using findcontrol in code behind.whats the use?
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