Develop Reference

How to get value of TextBox of GridView in C#?

I'm little bit confusion, how to get value of TextBox of GridView in RowEditing and I've textchange event and that textbox value need to update via gridview to database. but before updating we need to calculate that value.
In RowUpdating we get value normally but in function calculationA() i'm not getting value of textbox. and need to calculate that value and show edited value in same textbox also.
public void calculationA()
{
TextBox txt_BCICU = (TextBox)grdlist.FindControl("txt_BCICU");
TextBox txt_BCSupDlx = (TextBox)grdlist.FindControl("txt_BCSupDlx");
txt_TotalChargeA.Text = (Convert.ToDecimal(txt_BCSupDlx.Text.Trim()) + Convert.ToDecimal(txt_BCICU.Text.Trim())).ToString();
protected void txt_BCICU_TextChanged(object sender, EventArgs e)
{
calculationA();
}
protected void grdlist_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
TextBox txt_BCICU = (TextBox)grdlist.Rows[e.RowIndex].FindControl("txt_BCICU");
TextBox txt_BCSupDlx = (TextBox)grdlist.Rows[e.RowIndex].FindControl("txt_BCSupDlx");
}

APPROACH 1
You don't need TextChanged event to get value of textbox in gridview.
You can get the textbox value in RowUpdating event as in code below.
Also, remove the calculationA method and instead use the last line of code I have given in RowUpdating event.
protected void grdlist_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
string textBox1Text = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("txt_BCICU")).Text;
string textBox2Text = ((TextBox)GridView1.Rows[e.RowIndex].FindControl("txt_BCSupDlx")).Text;
//remove the calculationA function and just use the code below in
//RowUpdating event
txt_TotalChargeA.Text = (Convert.ToDecimal(textBox2Text.Trim()) + Convert.ToDecimal(textBox1Text.Trim())).ToString();
}
APPROACH 2
If you must have the TextChanged event then you can get textbox values as in code snippet below.
I have commented the call to calcualteA method since the same calculation can be done in TextChanged event. Note how the current grid row is obtained by getting the NamingContainer property of the textbox that raised the TextChanged event.
Get Textbox values in TextChanged event
protected void txt_BCICU_TextChanged(object sender, EventArgs e)
{
//find this textbox Text i.e. txt_BCICU Text
string txtBCICUText = (sender as TextBox).Text;
//find the current grid row and through it other textboxes text
GridViewRow currentRow = (sender as TextBox).NamingContainer as GridViewRow;
//find textbox txt_BCSupDlx Text
string txtBCSupDlxText = ((TextBox)currentRow.FindControl("txt_BCSupDlx")).Text;
//do your calculation here
txt_TotalChargeA.Text = (Convert.ToDecimal(txtBCSupDlxText.Trim()) + Convert.ToDecimal(txtBCICUText.Trim())).ToString();
//calculationA();
}

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.

How to check if column header is clicked in datagridview using SelectionChanged event

I'm using SelectionChanged event of a DataGridView. I have a code that will display the value of a DataGridView's cell to a TextBox. However, when I click the column header, this also triggers the code (I assume because of the SelectionChanged event) and will display an error.
What I want to achieve is to enclose my codes in the datagridview1_SelectionChanged in an if statement. Wherein:
if(column header is clicked)
//don't do anything`
else
//do the display of data to textbox`
I just want to know the code for checking if you clicked a header or not.

just check in the event
List_SelectionChanged(object sender, EventArgs e)
{
if(e.Rowindex>-1)
...
}
-1 is for header

You could check your DataGridView's CurrentRow for null. If it is not null it means that you've not clicked the column header:
private void yourDataGridView_SelectionChanged(object sender, EventArgs e)
{
var current = yourDataGridView.CurrentRow;
if (current != null) // Means that you've not clicked the column header
{
//Display the value of a DataGridView's cell to a TextBox
}
}

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.