I want to get the Text property from a TextBox that is inside a GridView. This TextBox has some data that come from my database. When I change this data, I wanna do a Update in my database.
But when I search for the Text of my TextBox, he get the old value that come from my database and not the value that I put now.
How can I do, to get my actual data that I write in my TextBox and not that come from my databse ?
protected void VerifyPriority()
{
for (int i = 0; i < GridView1.Rows.Count; i++)
{
GridViewRow RowView = (GridViewRow)GridView1.Rows[i];
TextBox txt = (TextBox)GridView1.Rows[i].FindControl("txtPriority");
if (txt != null)
{
if (txt.Text != this.changes[i])
{
this.UpdatePriority(this.codigo[i], txt.Text);
}
}
}
}
More than likely you're you're rebinding the GridView after every postback instead of binding it once and letting ViewState persist the data. If you bind the GridView every time the page is posted back, any changes you make will be wiped out and replaced with the information from the database.
Do your binding on the first page load only (in this case):
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
GridView1.DataSource = GetSomeData();
GridView1.DataBind();
}
}
After putting the above code in place, you should be able to get the correct data from the TextBox:
foreach (GridViewRow row in GridView1.Rows)
{
TextBox txt = row.FindControl("TextBox1") as TextBox;
if (txt != null)
{
string value = txt.Text;
}
}
Related
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.
I have a grid and I need to get readonly textbox value in gridview c# from code behind
protected void grd1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if (txt.Text != "")
{
txt.Attributes.Add("readonly", "readonly");
txt.Visible = false;
lbltaskname.Visible = true;
}
else
{
txt.Attributes.Remove("readonly");
}
}
}
You can do itself on aspx page.
Assuming that dataset is attached(bind) to the grid from code behind, now coming to gridview on aspx page , add textbox control to grid , in text property of texbox assign value from dataset by -
<%# Bind("your_column_name")%>
and add
readonly = true
to textbox.
Thanks
In my webpage, I have Calendar, Table and button.
After selecting date, it will fire the databind() method of table. There are checkboxes with autopostback =true. Once checked, the Table disappears. I have no idea on how to retain the table with the checked checkboxes after post back.
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString.Get("Id") != null)
{
if (!IsPostBack)
{
Calendar1.Visible = false;
}
}
}
protected void Calendar1_SelectionChanged(object sender, EventArgs e)
{
Label1.Text = Calendar1.SelectedDate.ToShortDateString();
//Set datasource = (cal.selectedDate), the invoking override
// DataBind() method to create table
}
Calendar1.Visible = false;
}
I've tried to databind the table again else (IsPostBack) but i wasn't able to achieve my goals, instead, it created another table on top of the existing table
This is the method to create Table with checkboxes
public override void DataBind()
{
TableRow myTableRow = default(TableRow);
TableCell myTableCell = default(TableCell);
if (source != null && !(mDate == DateTime.MinValue))
{
for (int i = 0; i <= 23; i++)
{
foreach (DataRow row in source.Tables["Object"].Rows)
{
myTableCell = new TableCell();
CheckBox cb = new CheckBox();
cb.AutoPostBack = true;
cb.Attributes.Add("id", row["objid"].ToString());
cb.InputAttributes.Add("rowID", mDate.Date.AddHours(i).ToString());
myTableCell.Controls.Add(cb);
myTableCell.HorizontalAlign = HorizontalAlign.Center;
myTableRow.Cells.Add(myTableCell);
TimeSheetTable.Rows.Add(myTableRow);
}
}
}
else
{
throw new ArgumentException(" Invalid Date.");
}
}
Dynamically generated tables need to be regenerated on every postback. For subsequent postbacks, viewstate will be reloaded, but you have to recreate the table, cells, and controls in the same exact fashion, otherwise web forms complains about it. You need to do this during Init I believe; if checkbox checked status changed, the web forms framework will update the Checked property after load, so that will be taken care of.
I usually use a repeater or listview control as dynamic controls can be painful and the ListView is pretty flexible. Databinding takes care of rebuilding the control tree for you.
I am displaying columns in a GridView and one of the columns is a dropdownlist. I want to be able to save the option selected in the dropdownlist as soon as something is selected. I have done this with one of the columns that has a textbox so I was hoping to do something similar with the DropDownList.
The code for the textbox and dropdownlist:
protected void gvPieceDetails_ItemDataBound(object sender, GridViewRowEventArgs e) {
if (e.Row.RowType == DataControlRowType.DataRow) {
JobPieceSerialNo SerNo = e.Row.DataItem as JobPieceSerialNo;
if (SerNo != null) {
TextBox txtComment = e.Row.FindControl("txtComment") as TextBox;
txtComment.Text = SerNo.Comment;
txtComment.Attributes.Add("onblur", "UpdateSerialComment(" + SerNo.ID.ToString() + ", this.value);");
DropDownList ddlReasons = (e.Row.FindControl("ddlReasons") as DropDownList);
DataSet dsReasons = DataUtils.GetUnapprovedReasons(Company.Current.CompanyID, "", true, "DBRIEF");
ddlReasons.DataSource = dsReasons;
ddlReasons.DataTextField = "Description";
ddlReasons.DataValueField = "Description";
ddlReasons.DataBind();
ddlReasons.Items.Insert(0, new ListItem("Reason"));
}
}
How to I create an update function for a dropdownlist?
protected void DDLReasons_SelectedIndexChanged(object sender, EventArgs e)
{
string sel = ddlReasons.SelectedValue.ToString();
}
public static void UpdateSerialReason(int SerNoID, string Reasons)
{
JobPieceSerialNo SerNo = new JobPieceSerialNo(SerNoID);
SerNo.Reason = sel; //can't find sel value
SerNo.Update();
}
Dropdownlist:
<asp:DropDownList ID="ddlReasons" runat="server" OnSelectedIndexChanged="DDLReasons_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>
I created an OnSelectedIndexChanged function to get the selected value. But how do I then save that value? Is there a way to pass it into the UpdateSerialReason function?
Just move the string sel declaration outside the scope of DDLReasons_SelectedIndexChanged and get the Text of the SelectedItem since it's included in your data source.
private string sel;
protected void DDLReasons_SelectedIndexChanged(object sender, EventArgs e)
{
sel = ddlReasons.SelectedItem.Text;
}
public static void UpdateSerialReason(int SerNoID, string Reasons)
{
JobPieceSerialNo SerNo = new JobPieceSerialNo(SerNoID);
SerNo.Reason = sel; // Should now be available
SerNo.Update();
}
The way you had it previously it was only available in the local scope, i.e, inside the method in which it was being declared and used.
You can get selected value when you call your function:
UpdateSerialReason(/*Some SerNoID*/ 123456, ddlReasons.SelectedValue)
You will lose your value after postback is done if you save value to variable as Equalsk suggested. If you need to use your value on the other page you can save it in session.
If you are working within one asp.net page you can do as I suggested above. Then you can skip the postback on your DropDownList and call UpdateSerialReason when you need :)
And you might want to add property ViewStateMode="Enabled" and EnableViewState="true"
I am making conditional formatting changes to the data in my gridview using a RowDataBound event:
void gvReg_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DateTime lastUpdate DateTime.Parse(DataBinder.Eval (e.Row.DataItem, "LAST_UPDATE");
if (lastUpdate < DateTime.Today.AddMonths(-1))
{
Hyperlink hypLastUpdate = (Hyperlink)e.Row.FindControl("hypLastUpdate";
hypLastUpdate.CssClass = "Error";
hypLastUpdate.NavigateUrl = "http://www.someExampleErrorPage.com";
}
}
}
This works, and sets the proper CssClass to the hyperlink (which makes it a jarring shade of bold red), but once the gridview is sorted (via the user clicking a column heading) the css class is reset on hypLastUpdate and it loses both it's style and associated NavigateUrl property.
The control hypLastUpdate is contained in a template field in a gridview, and it's text value is databound to a field called "LAST_UPDATE".
Is this a planned behavior (is sorting supposed to break the conditional formatting done in RowDataBound events?) or is there something I can check to make sure I am not doing something incorrectly?
I am not using the DataBind method anywhere in the code behind, and viewstate is turned on for the gridview in question.
--EDIT--
It ended up being a mistake in event handling.
I was doing:
gvReg.Sorted += {SomeEventHandler}
Inside of the page load event, but only when it wasn't a postback. This function called gvReg.DataBind after the grid view was sorted. I removed the handler wire up and instead added the event handler function to the OnSorted event. I guess assigned delegates to a gridview are not saved in ViewState between callbacks?
Hi here is a quick example of what I meant on my comment. This is the only way i could think of it:
protected void gvReg_Sorting(object sender, GridViewSortEventArgs e)
{
GridView gridView = (GridView)sender;
if (e.SortExpression.Length > 0)
{
foreach (DataControlField field in gridView.Columns)
{
if (field.SortExpression == e.SortExpression)
{
cellIndex = gridView.Columns.IndexOf(field);
break;
}
}
if (pSortExpression != e.SortExpression)
{
pSortDirection = SortDirection.Ascending;
}
else
{
pSortDirection = (pSortDirection == SortDirection.Ascending ? SortDirection.Descending : SortDirection.Ascending);
}
pSortExpression = e.SortExpression;
}
//Retrieve the table from the database
pSortOrder = pSortDirection == SortDirection.Ascending ? "ASC" : "DESC";
List<Partners> partnerList = GetPartnerList();
gvReg.DataSource = partnerList;
gvReg.DataBind();
}