protected void Page_Load(object sender, EventArgs e)
{
bindbranches();
bindbranches1();
}
public void bindbranches()
{
DataTable dtbranch = new DataTable();
dtbranch = objsupplyBAL.getbrnch();
ddlbranch.DataSource = dtbranch;
ddlbranch.DataBind();
ddlbranch.Items.Add(new ListItem("--select--", "0"));
ddlbranch.SelectedIndex = ddlbranch.Items.Count - 1;
}
public void bindbranches1()
{
DataTable dt = new DataTable();
dt = objsupplyBAL.getbrnch();
ddlbranch1.DataSource = dt;
ddlbranch1.DataBind();
ddlbranch1.Items.Add(new ListItem("--select--", "0"));
ddlbranch1.SelectedIndex = ddlbranch1.Items.Count - 1;
}
My dropdownlist's are not binding without refreshing.If i select one dropdownlist another one is refreshing. What i have to add extra to my code. Can any one tell...
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
bindbranches();
bindbranches1();
}
}
if you add this...it's work properly ...first try this...
The reason that is happening is you are running the code every time the page postsback, try the following to only populate the items once (on the initial page load) :
protected void Page_Load(object sender, EventArgs e) {
if (!this.IsPostBack) {
bindbranches();
bindbranches1();
}
}
Alternatively you can also handle the Page.Init event to run this code, this will change the dropdowns when the page is first loaded and will keep the values throughout subsequent postbacks :
protected void Page_Init(object sender, EventArgs e) {
bindbranches();
bindbranches1();
}
If you want the second dropdown to refresh only when the first item is selected, try the following solution :
protected void ddlbranch_SelectedIndexChanged(object sender, EventArgs e) {
bindbranches1();
}
And bind ddlbranch_SelectedIndexChanged to the selected index changed event of your ddlbranch control. This will only run the code when the page is initially loaded and when the user selects an item from the ddlbranch dropdown
You will have to set AutoPostBack Property of the drop down to true if you want to fill another drop down on change of one drop down so on change event will start executing
Loot # http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.listcontrol.autopostback.aspx
Related
I have a button whose text (a counter on datatable) should be changed when I click Update or Add button.
But it doesn't. It only does when I refresh the page only, why ?
Button are within UpdatePanel.
protected void Page_Load(object sender, EventArgs e)
{
DataTable dt = ShowLastHearingDates();
if (dt.Rows.Count > 0)
{
btnShowLasthearingDates.Text = dt.Rows.Count.ToString();
}
update:
protected void btnupdate_click(object sender, Eventargs e)
{
if (MngCaseHearings.UpdateCaseANDHearingDetails(CaseNo, CaseTitle))
{
btnUpdate.Visible = false;
btnAddCaseAndHearingDetails.Visible = true;
}
}
Problem is that the page load event happens before your update occurs. You can put the code in the page prerender event which will be hit after the page load and control event
try to put UpdateMode to "always"
or put all related control in the samne panal
or put AsyncPostBackTrigger
this urls my help
https://msdn.microsoft.com/en-us/library/bb386454.aspx
http://code.runnable.com/UhmIdrdIZy9aAATR/how-to-use-updatepanel-in-asp-net
I have a datagridview (dataGridView1) pulling information out of a mdb datasource called rentBindingSource, how can I pull information out of hireBindingSource on a button click i.e.
private void viewHire_Click(object sender, EventArgs e)
{
// refresh datagrid view to load stuff from hireBindingSource
}
Try this:
private void viewHire_Click(object sender, EventArgs e)
{
dataGridView1.DataSource = hireBindingSource;
}
I have a DataSource assigned to a DropDownList (DD2) that has a WHERE clause specified by the contents of another DropDownList (DD1). When I change the DD1, however, that DD2 does not reload its data. Is there a way to get DD2 to reload when DD1 is changed?
I've tried:
protected void DD1_SelectedIndexChanged(object sender, EventArgs e)
{
DD2.DataBind();
}
But this appears to do nothing.
Move the logic of setting the DD2 DataSource and DD2 DataBind() to a new function and call that instead. Your problem is likely that the datasource is getting incorrectly set.
protected void DD2Bind()
{
DD2.DataSource = //fetch data source
DD2.DataBind();
}
protected void DD1_SelectedIndexChanged(object sender, EventArgs e)
{
DD2Bind();
}
I want to add new items to my generic list when user clicks on a button, but each the the list contains only the last introduced item, it seems that during each button click list get reinitialized :(.
This is a part of code:
List<ProdusBon> listaProduseBon = new List<ProdusBon>();
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
listaProduseBon.Add(new ProdusBon(-1, Int32.Parse(TextBox2.Text), -1, Int32.Parse (ListBox1.SelectedValue)));
}
I also tried using this code:
List<ProdusBon> listaProduseBon = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
listaProduseBon = new List<ProdusBon>();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
listaProduseBon.Add(new ProdusBon(-1, Int32.Parse(TextBox2.Text), -1, Int32.Parse (ListBox1.SelectedValue)));
}
but in this case a null reference exception was raised.
I must keep all the items in the list and not only the last one, and when click event was raised a new item to be added to the list.
All the controls in Default.aspx got the default values only the ListBox has "Enable AutoPostBack" set to true but i believe that this is not causing this behavior.
I do not how to keep the items in the list in these conditions, please give me a hand if you know how to do this.
Thanks !
Member variables are lost between page loads. You could store the variable in Session if you want it to remain the same value between loads.
List<ProdusBon> listaProduseBon
{
get { return (List<ProdusBon>) Session["ProdusBon"]; }
set { Session["ProdusBon"] = value; }
}
protected void Page_Load(object sender, EventArgs e)
{
if (listaProduseBon == null) listaProduseBon = new List<ProdusBon>();
}
protected void Button1_Click(object sender, EventArgs e)
{
listaProduseBon.Add(new ProdusBon(-1, Int32.Parse(TextBox2.Text), -1, Int32.Parse (ListBox1.SelectedValue)));
}
On your button click event first bind the list button and then add the new item from the textbox.
protected void Button1_Click(object sender, EventArgs e)
{
//code to bind your list goes here
listaProduseBon.Add(new ProdusBon(-1, Int32.Parse(TextBox2.Text), -1, Int32.Parse (ListBox1.SelectedValue)));
}
I have a DDL and a ASP .net Grid view in my aspx page. I have two methods getALLProgram and getProgramBy name, both are working fine. My problem is: when the page is loaded for the first time, I want to call the getAllprogram method, after that if a User selects a program from DDL I want my getprogramByname method to be called.
How here is my code:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindProgramDDL();
BindGrid();
}
//BindProgramDDL();
}
protected void BindGrid()
{
string strProgramCode = DDLProgram.SelectedIndex.ToString();
List<FormGridEntity> gridEntities = new List<FormGridEntity>();
GridForResult.DataSource = gridEntities;
GridForResult.DataBind();
//throw new NotImplementedException();
}
protected void BindProgramDDL()
{
List<CcProgramEntity> programEntities = FormSaleSubmit_BAO.GetAllPrograms();
DDLProgram.DataSource = programEntities;
DDLProgram.DataTextField = "Shortname";
DDLProgram.DataValueField = "Id";
DDLProgram.DataBind();
string programCode = programEntities[DDLProgram.SelectedIndex].Code;
}
protected void OnDDLProgramChanged(object sender, EventArgs e)
{
List<CcProgramEntity> programEntities = FormSaleSubmit_BAO.GetAllPrograms();
string programCode = programEntities[DDLProgram.SelectedIndex].Code;
}
The Code is incomplete. i am still working on it. But I not getting the logic How will I make this happen that I have told you here. I hope I made my question clearly, if it confusing, please let me know what else I should provide here.
You should check in your BindGrid if any program has been selected or not and route the call as per that. For example,
protected void BindGrid()
{
...
if (DDLProgram.SelectedIndex >= 0)
{
// program selected
var programCode = DDLProgram.SelectedValue;
data = GetProgramByName(programCode);
}
else
{
// get all programs
data = GetAllPrograms();
}
// bind data with grid
}
You can either call BindGrid in page_load unconditionally (i.e. in post-back scenarios also) or invoke it on your DDL change.
how about writing getProgramByname on a selected index changed event of a drop down list and getALLProgram on page load event ?
I hope, I was clear on what your doubt and the above mentioned suggestion did helped.
Just change these 2 things
protected void BindGrid()
{
List<FormGridEntity> gridEntities = (DDLProgram.SelectedIndex==-1)
?FormSaleSubmit_BAO.GetAllPrograms()
:FormSaleSubmit_BAO.GetProgramByName(DDLProgram.SelectedValue);
GridForResult.DataSource = gridEntities;
GridForResult.DataBind();
}
protected void OnDDLProgramChanged(object sender, EventArgs e)
{
BindGrid();
}