Develop Reference

Access gridview row's data from LinkButton inside that row

Each row of the GridView is populated from a SQL DB.
Each row has a LinkButton that brings up a popup.
In the code behind I want to have access to the DataField="RCID"
I guess I'd like to attach the RCID field to the Upload link so when it's clicked I have access to the RCID within the function that handles the onclick.
How do I get this rows RCID?
<asp:GridView ID="GridView1" runat="server"
OnPageIndexChanging="GridView1_PageIndexChanging"
GridLines="Horizontal" AllowPaging="true" OnRowCommand="GridView1_RowCommand" AutoGenerateColumns="false">
<Columns>
<asp:BoundField HeaderText="RCID" DataField="RCID" Visible="false"></asp:BoundField>
<asp:BoundField HeaderText="RC Type" DataField="RCType"></asp:BoundField>
<asp:BoundField HeaderText="Channel" DataField="Channel"></asp:BoundField>
<asp:BoundField HeaderText="Total" DataField="Total"></asp:BoundField>
<asp:BoundField HeaderText="Expired In 30 Days" DataField="ExpiredIn30Days"></asp:BoundField>
<asp:BoundField HeaderText="Expired In 60 Days" DataField="ExpiredIn60Days"></asp:BoundField>
<asp:BoundField HeaderText="Expired In 90 Days" DataField="ExpiredIn90Days"></asp:BoundField>
<asp:BoundField HeaderText="Last Updated" DataField="LastUpdated"></asp:BoundField>
<asp:TemplateField HeaderText="Management">
<ItemTemplate>
<asp:LinkButton runat="server" ID="Upload" Text="Upload" CommandName="Upload" ></asp:LinkButton> |
<asp:LinkButton runat="server" ID="Details" Text="Details" CommandName="Details"></asp:LinkButton> |
<asp:LinkButton runat="server" ID="Files" Text="Files" CommandName="Files"></asp:LinkButton> |
<asp:LinkButton runat="server" ID="Edit" Text="Edit" CommandName="Edit"></asp:LinkButton> |
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

Possible solution would be as follows:
Add RowCreated and RowCommand events for GridView
In RowCreated event, I have set “Visible” property to “false” for first column for both header and data row.
In RowCommand event, CommandName is checked first and then index for select command is retrieved. I have retrieved the row for that index and then retrieved the text in the specified row cell.
check this example:
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
e.Row.Cells[0].Visible = false;
}
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Cells[0].Visible = false;
}
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Select")
{
int index = Convert.ToInt32(e.CommandArgument);
GridViewRow row = GridView1.Rows[index];
Label1.Text = (row.Cells[0].Text);
}
}
Second approach:
Assign command argument to your hidden field value. This will reduce another efforts. check this way:
<asp:TemplateField HeaderText="Action3" Visible="false">
<ItemStyle HorizontalAlign="Center"></ItemStyle>
<ItemTemplate>
<asp:LinkButton ID="lnkretqty" runat="server" Text="Return Qty" CommandName="RETQTY" ToolTip="Click here to Add Return Qty Entry"
CommandArgument='<%# Container.DataItemIndex %>'>
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
Code Behind code
protected void gvsearch_RowCommand(object sender, GridViewCommandEventArgs e)
{
try
{
if (e.CommandName == "SRCSELREC")
{
Int32 rowind = Convert.ToInt32(e.CommandArgument.ToString());
string val = ((Label)gvgpitemdtl.Rows[rowind].FindControl("d")).Text.ToString();
}
}
catch (Exception ex)
{
General.MessageBox(this.Page, "Error at Gridview Row Command : " + ex.Message.ToString());
return;
}
}
References:
Way of getting Hidden column value in GridView
How to Get Hidden Column values in GridView
To Find Control in GridView on RowCommand event in asp.net
How to hide GridView column and retrieve value from hidden column cell in ASP.NET

Add CommandArgument='<%# Eval("RCID") %>' in the linkbutton's markup:
<asp:LinkButton runat="server" ID="Upload" Text="Upload" CommandName="Upload" CommandArgument='<%# Eval("RCID") %>'/>
Now, in the code behind of the handler, just read the CommandArgumentproperty of the passed GridViewCommandEventArgs parameter:
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Upload")
{
var valueOfRCID = e.CommandArgument;
}
}

mshsayem may be right but note you can also just grab the value from within the click event as follows
<asp:LinkButton runat="server" ID="Upload" Text="Upload" OnClick="Upload_Click" CommandArgument='<%# Eval("RCID") %>'/>
protected void Upload_Click(object sender, EventArgs e)
{
LinkButton btn = (LinkButton)(sender);
string RCID = btn.CommandArgument;
}

How to get value of a gridview cell in this scenario

I have a link button inside a gridView as below :
<asp:TemplateField HeaderText="Analyze">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" Text="Analyze" runat="server" OnClick="LinkButton1_Click" />
</ItemTemplate>
</asp:TemplateField>
I have the LinkButton1_Click function as below :
protected void LinkButton1_Click(object sender, EventArgs e)
{
testtb.Text = name;
Console.WriteLine(name);
}
This variable "name" is the first column of the GridView.I am obtaining the value for "name" as below:
protected void UnanalysedGV_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRowView d = (DataRowView)e.Row.DataItem;
name = d["resultId"].ToString();
}
}
I want that on click of the link button the value of first column in that row of gridview becomes the text for the textbox testtb.
Somehow,the value for name remains null.
EDIT
I found out that probably RowDataBound isn't the correct event for my requirements because I need the value for each row.
So I removed the RowDataBound function.
I guess I have to handle this inside LinkButton1_Click itself.
I added this line to the function :
name = UnanalysedGV.SelectedRow.Cells[1].Text;
Still doesn't work.
Does anyone have any idea ?

You can do it using two approaches as mentioned below.
Handle click event of linkbutton through event bubbling code -
<asp:GridView AutoGenerateColumns="false" runat="server" ID="grdCustomPagging" OnRowCommand="grdCustomPagging_RowCommand">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="RowNumber" />
<asp:BoundField DataField="DealId" HeaderText="DealID" />
<asp:BoundField DataField="Dealtitle" HeaderText="DealTitle" />
<asp:TemplateField HeaderText="View">
<ItemTemplate>
<asp:LinkButton runat="server" ID="lnkView" CommandArgument='<%#Eval("DealId") %>'
CommandName="VIEW">View Deal</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
protected void grdCustomPagging_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "VIEW")
{
LinkButton lnkView = (LinkButton)e.CommandSource;
string dealId = lnkView.CommandArgument;
}
}
Handle click event of linkbutton directly click event code -
<asp:GridView AutoGenerateColumns="false" runat="server" ID="grdCustomPagging">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="RowNumber" />
<asp:BoundField DataField="DealId" HeaderText="DealID" />
<asp:BoundField DataField="Dealtitle" HeaderText="DealTitle" />
<asp:TemplateField HeaderText="View">
<ItemTemplate>
<asp:LinkButton runat="server" ID="lnkView" OnClick="lnkView_Click">View Deal</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
protected void lnkView_Click(object sender, EventArgs e)
{
GridViewRow grdrow = (GridViewRow)((LinkButton)sender).NamingContainer;
string rowNumber = grdrow.Cells[0].Text;
string dealId = grdrow.Cells[1].Text;
string dealTitle = grdrow.Cells[2].Text;
}
Hope this helps.

LinkButton event

In my grid view there is a LinkButton and I have defined CommandName="Download" CommandArgument='<%#Eval("FileID")%>' for the LinkButton, but I do not know how to find click event for the Link Button? please help how I can code for this LinkButton with using e. CommandName
<asp:GridView ID="GridViewEfile" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#000000" GridLines="Both" DataKeyNames="FileID">
<AlternatingRowStyle BackColor="Yellow" />
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" OnClick = "Retreive_file" CommandName="Download" CommandArgument='<%#Eval("FileID")%>'><%#Eval("FileName")%></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>

You don't have to use Click and Command events together. Command is enough.
protected void LinkButton1_Command(object sender, CommandEventArgs e)
{
// Do something with e.CommandName or e.CommandArgument
}
<asp:LinkButton ID="LinkButton1" runat="server" OnCommand="LinkButton1_Command"
CommandName="Download" CommandArgument='<%#Eval("FileID")%>'>

You need to get rid of the click event OnClick = "Retreive_file" on button. has no meaning here
public void GridViewEfile_OnRowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Download")
{
// here goes your code
}
}

Remove OnClick = "Retreive_file"
<asp:GridView ID="GridViewEfile" runat="server" AutoGenerateColumns="False" OnRowCommand="GridViewEfile_OnRowCommand" CellPadding="4" ForeColor="#000000" GridLines="Both" DataKeyNames="FileID">
<AlternatingRowStyle BackColor="Yellow" />
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CommandName="Download" CommandArgument='<%#Eval("FileID")%>'><%#Eval("FileName")%></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
and use function
public void GridViewEfile_OnRowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Download")
{
//you can get your command argument values as follows
string FileId=e.CommandArgument.ToString();
}
}

update Ajax rating control, update comments

I am trying to update the value of ajaxrating control and comments in the database`
` <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" DataKeyNames="id"
onrowdatabound="GridView1_RowDataBound" >
<Columns>
<asp:BoundField HeaderText="PurchasedPID" DataField="PurchasedPID"/>
<asp:BoundField HeaderText="DatetimePurchased" DataField="orderdate" />
<asp:BoundField HeaderText="MMBName" DataField="MMBName" />
<asp:TemplateField HeaderText="Rating">
<ItemTemplate>
<asp:Rating RatingDirection="LeftToRightTopToBottom" Visible="true" AutoPostBack="true"
ID="Rating2" runat="server" MaxRating="5"
StarCssClass="star_rating" EmptyStarCssClass="star_empty"
FilledStarCssClass="star_filled" WaitingStarCssClass="star_saved" CurrentRating='<%# Bind("Rating") %>'
OnChanged="Rating2_Changed" >
</asp:Rating>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Comments">
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text= '<%# Bind("Comments") %>' multiline="true">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Action">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server">Submit</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
So I added the following rowcommand event on of the members suggestion.
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Submit")
{
GridViewRow row = (GridViewRow)(((LinkButton)e.CommandSource).NamingContainer);
Int32 Id = Convert.ToInt32(e.CommandArgument);
int ratingScore = ((AjaxControlToolkit.Rating)row.FindControl("Rating2")).CurrentRating;
TextBox TextComments = row.FindControl("TextBox1") as TextBox;
string comments = TextComments.Text;
objBLL.UpdateRating(ratingScore, Id,comments);
}
But here instead of getting the new rating, it is inserting the CurrentRating in the table.
int ratingScore = ((AjaxControlToolkit.Rating)row.FindControl("Rating2")).CurrentRating;
I think its because of this CurrentRating here.
Any idea how to get the value of updated rating? Or should i use an additional Rating_changed event to update the rate, and then a row command event to update the comments
Thanks
Sun

The easiest way to bind the your DataKey/ItemID to the Tag attribute of the Rating control
<asp:Rating RatingDirection="LeftToRightTopToBottom" Visible="true"
AutoPostBack="true"
ID="Rating2" runat="server" MaxRating="5" **Tag='<%# Bind("id")%>'**
StarCssClass="star_rating" EmptyStarCssClass="star_empty"
FilledStarCssClass="star_filled" WaitingStarCssClass="star_saved"
CurrentRating='<%# Bind("Rating") %>'
OnChanged="Rating2_Changed" >
</asp:Rating>
Event Handler
protected void Rating2_Changed(object sender, AjaxControlToolkit.RatingEventArgs e)
{
Rating r = sender as Rating;
int id = Convert.ToInt32(r.Tag);
objBLL.UpdateRating(Convert.ToInt32(e.Value),id)
}

You can use GridView1_RowCommand to update rating score in the DB. e.g.
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Rating")
{
GridViewRow row = (GridViewRow)(((ImageButton)e.CommandSource).NamingContainer);
Int32 Id = Convert.ToInt32(e.CommandArgument);
ratingScore = ((AjaxControlToolkit.Rating)row.FindControl("Rating2")).CurrentRating;
}
}
Set CommandName="Rating" to your linkbutton
<asp:TemplateField HeaderText="Action">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CommandName="Rating">Submit</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>

Using C#, how to get one cell text from edited row?

Hy,
I have a gridView control in Asp.NET like this:
<asp:GridView ID="outputGridView" runat="server" onrowediting="OutputGridView_RowEditing">
<asp:TemplateField ItemStyle-HorizontalAlign="Left" ItemStyle-VerticalAlign="Middle"
ItemStyle-Width="250px" HeaderText="JobId" HeaderStyle-HorizontalAlign="Left"
HeaderStyle-BorderWidth="1px" HeaderStyle-BorderColor="#e1e1e1">
<ItemTemplate>
<%# Eval("JobId")%>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Left" VerticalAlign="Middle" Font-Bold="True"></HeaderStyle>
<ItemStyle HorizontalAlign="Left" VerticalAlign="Middle" Width="250px" BorderWidth="1px"
BorderColor="#e1e1e1"></ItemStyle>
</asp:TemplateField>
</aspGridView>
On OutputGridView_RowEditing I have this code:
protected void OutputGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
GridViewRow currentRow = outputGridView.Rows[e.NewEditIndex];
string JobId = currentRow.Cells[2].Text;
e.Cancel = true;
}
But in 'JobId' string its "", does anyone have any idea how can I get the text of the third cell from the row that is being edited?
Thank you,
Jeff

Ok what Bonshington said is correct, accept you want to add an id to the label.
<ItemTemplate>
<asp:Label ID="LblJobId" runat="server" Text='<%# Eval("JobId") %>' />
</ItemTemplate>
protected void OutputGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
GridViewRow currentRow = outputGridView.Rows[e.NewEditIndex];
Label jobIdLabel = (Label)currentRow.Cells[2].FindControl("LblJobId");
string jobId = jobIdLabel.Text;
e.Cancel = true;
}

Please use Bind() method instead of Eval() method, it is for evaluation purpose only.

try to put it in literal cotnrol
<label><%# Eval("JobId")%></label>
and your jobID column will positioned as cell's child control

if you want to get GridViewRow currentRow you have to use
<Columns>
<asp:TemplateField>
<EditItemTemplate><asp:Label id="lbl" Text="<%# Eval("JobId")%>" /></EditItemTemplate>
</asp:TemplateField>
</Columns>
Auto-generated grid columns use Cells property
protected void OutputGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
OutputGridView.Rows[e.NewEditIndex].Cells[0]
}