Event Handlers for Controls Contained in Grid Veiw Row

Hi,

This is about , what happens when control in a GridView Row is clicked:

Example 1: Button Field

------------------------------------------------------------------------------------------

<asp:ButtonField HeaderText="<%$ Resources:GridHeaderReferenceNumber %>" ItemStyle-HorizontalAlign="Left" DataTextField="OrderRefNumber" CommandName="ReferenceNumber" ></asp:ButtonField>

protected void GridviewClickEventHandler(Object sender, GridViewCommandEventArgs e)

{

if (e.CommandName.Equals("ReferenceNumber"))

{

int selectedIndex = Int32.Parse((e.CommandArgument).ToString());

GridViewRow row = gridViewPastOrders.Rows[selectedIndex];

Control cell = row.Cells[0].Controls[0];

LinkButton lk = (LinkButton)cell;

string str = ((LinkButton)cell).Text;

}

}

------------------------------------------------------------------------------------------

Example 2: Template Field containing control with ‘CommandName’

<asp:TemplateField HeaderText="<%$ Resources:GridviewHeaderOrderReference %>" SortExpression="DocNumber" >

<ItemTemplate>

<asp:LinkButton id="linkButton" OnClientClick="" runat="server" Font-Underline="True" CommandName="ReferenceNumber" Text='<%# DataBinder.Eval(Container, "DataItem.DocNumber") %>' >

</asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

protected void GridviewClickEventHandlerPastOrderItems(Object sender, GridViewCommandEventArgs e)

{

if (e.CommandName.Equals("ReferenceNumber"))

{

string selectedIndex = ((LinkButton)(e.CommandSource)).Text;

}

}

------------------------------------------------------------------------------------------

Example 3: Template Field containing control with Event Handler

<asp:TemplateField HeaderText="<%$ Resources:GridviewHeaderDescription %>" SortExpression= "Description">

<ItemTemplate>

<asp:LinkButton id="linkButtonProductNumber" OnClientClick="showProductDetails()" onclick="linkButtonProductDescription_Click" runat="server" Font-Underline="True" CommandName="View" Text='<%# DataBinder.Eval(Container, "DataItem.Description") %>'>

</asp:LinkButton>

</ItemTemplate>

</asp:TemplateField>

protected void linkButtonProductDescription_Click(object sender, EventArgs e)

{

GridViewRow selectedRow = (GridViewRow)((DataControlFieldCell)((LinkButton)sender).Parent).Parent;

string productIPC = ((LinkButton)(selectedRow.FindControl("linkButton"))).Text;

selectedID = selectedRow.RowIndex;

}

------------------------------------------------------------------------------------------

Summary:-

Template Field – Command Name

• e.CommandName –
• e.CommandArgument – “” (Blank)
• e.CommandSource - Text/Caption of the Button/Control
• e.Row -> GridViewRow
• · e.Row.RowIndex -> Selected Row Index

Template Field – Click Event Handler

• (sender as Button).Parent.Parent -> GridViewRow
• GridViewRow.RowIndex -> Selected Row Index
• (sender as Button).Text -> Text/Caption of the Button/Control

asp:ButtonField

• e.CommandName –
• e.CommandArgument – Selected Row Index
• e.CommandSource -> GridView
• GridView.Rows[e.CommandArgument] -> GridViewRow
• (GridViewRow.Cells[0].FindControl[“”] as Button).Text –> Text/Caption of the Button/Control
• e.Row -> null

Thanks & Regards,

Arun Manglick

SMTS || Microsoft Technology Practice || Bridgestone - Tyre Link || Persistent Systems || 3023-6258

DISCLAIMER ========== This e-mail may contain privileged and confidential information which is the property of Persistent Systems Pvt. Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Pvt. Ltd. does not accept any liability for virus infected mails.