Develop Reference

Make GridView AutGenerateColumn a LinkButton that fires RowCommand event

Simple question which my searches seem to be coming up blank on.
I have a GridView that is AutoGeneratingColumns=True
This generates a column "MyColumn". I would like to make this columns value a clickable LinkButton that fires the RowCommand event of the GridView with a specific CommandNmae and the cells value as the CommandArgument.
I'm trying to do this without using a custom ItemTemplate, I know how to do that. I'm hoping i can pragmatically modify a auto generated column in the GridView as described.
Tia

This can be done in the OnRowDataBound event of the GridView.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//check if the current row is a datarow
if (e.Row.RowType == DataControlRowType.DataRow)
{
///create a new linkbutton
LinkButton button = new LinkButton();
button.Text = "LinkButton";
button.CommandArgument = "MyArgs";
//assign a command to the button
button.Command += Button_Command;
//add the button to cell x
e.Row.Cells[3].Controls.Add(button);
}
}
Because you are adding control dynamically, the binding of the GridView should NOT be wrapped inside an IsPostBack check. Something you would do normally.

onRowdatabound not giving label value in asp.net

I am creating the dynamic grid and adding textbox and label in row dynamically on some button click and bind some data from the database to textbox and label.I want to change the label text color and text box read only for condition depend on database.i have used onRowDataBound event of gridview but not getting any value in the textbox and label for a row. Can anyone helps me to solve this issue? Thanks
protected void grdMasterData_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
Label status = e.Row.FindControl("lblProduct") as Label;
if (status.Text == "LY Actuals")
{
e.Row.Cells[0].CssClass = "lblProductColor";
// lbtAction.Visible = false;
}
}
}

In RowDataBound three row types provided by grid, you are using only DataRow, try to get your values from empty row and footer row because first record will not come in DataRow.

Gridview Label Appear in a Selected Row

I has a Gridview called Gridview1 which is binded to a datasource.
and I have a ItemTemplate at Column 5 within it contain a
- Linkbutton called search
- Label called lbl_password , visible press to true
- Label called txt_password , visible set to false
code in done in asp.net webForm , .aspx
when link button pressed this function will get the ID at cell 1 in the row tat button clicked
GridViewRow grdrow = (GridViewRow)((LinkButton)sender).NamingContainer;
string fieldID = grdrow.Cells[1].Text;
Now i want to know how can I make the txt and lbl become visible when the button pressed

I am assuming you mean when link button pressed you want to make the text and label from the same row to be visible.For that purpose you can just use the findcontrol method on gridview row to find the control you need.
If that's what you want then in link button click event you can do as follow,
protected void lnkButton_Click(object sender, EventArgs e)
{
GridViewRow grdrow = (GridViewRow)((LinkButton)sender).NamingContainer;
((TextBox)grdrow.FindControl("yourtextboxID")).Visible = true;
((Label)grdrow.FindControl("yourLabelID")).Visible = true;
}
Here is more info on findcontrol.

Catch dropdown selected text inside a repeater

I have dropdownlist inside a repeater and whenever the selected text is changed i have to show it in a textbox how can i do this??
protected void Repeater1_ItemCreated(object sender, RepeaterItemEventArgs e)
{
DropDownList ddl = (DropDownList)e.Item.FindControl("DropDownList6");
TextBox txt = (TextBox)e.Item.FindControl("TextBox4");
txt.Text = ddl.SelectedItem.Text;
}

First, don't use ItemCreated therefore since it triggered too early in the life-cycle(for the ViewState). You would also have to check for the ItemType first.
Instead use the DropDownLists SelectedIndexChanged event directly:
protected void Ddl_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList ddl = (DropDownList) sender;
RepeaterItem item = (RepeaterItem) ddl .NamingContainer;
TextBox txt = (TextBox) item.FindControl("TextBox4");
txt.Text = ddl.SelectedItem.Text;
}

you could add appropriate OnSelectedChange (somwthing) event handler to the DropDownList and then when event fired you catch it and do whatever you want , you can do it in both client side or server side .

You will need to use the add a handler to associate each dropdown control with the appropriate event handler. I don't have VS in front of me but it should be something like:
txt.SelectedIndexChanged += new EventHandler(YourMethodName)

Finding a control on Dropdownlist SelectedIndexChanged in Repeater

I have a repeater control which has a DropDownlist and a TextBox.
On selectedIndexChanged event of the dropdown, I need to enable or disable the textbox based on the dropdown selected value.
I am able to trigger the SelectedIndexChanged event but not able to find the TextBox control inside this event.
Below is my SelectedIndexChanged event handler in codebehind.
protected void ddl_userType_SelectedIndex(object sender, EventArgs e)
{
var ddl = (DropDownList)sender;
}
Could someone please help me achieve what I need.

Hope about something like this...
protected void ddl_userType_SelectedIndex(object sender, EventArgs e)
{
DropDownList ddl = sender as DropDownList;
RepeaterItem item = ddl.Parent as RepeaterItem;
Textbox tb = item.FindControl("MyTextBox") as Textbox;
}