I am having a database and I use it through Entity Framework, I need to update the data by editing the other items in text boxes and grid, that is working fine and below is the code:
In aspx.cs
protected void SaveBtn_Click(object sender, EventArgs e)
{
obj.Address = AppAddress.Text;
obj.City = AppCity.Text;
obj.Email = AppEmail.Text;
obj.Notes = AppComments.Text;
obj.Postal = AppPostal.Text;
obj.AppraiserAppraiserCompanyId = ApprCompCmbx.SelectedIndex;
obj.ProvinceState = Province.SelectedIndex;
apprblobj.GetUpdate(obj);
Response.Write("<script>alert('You have successfully updated the Data');</script>");
}
call in the BL:
public void GetUpdate(Appraiser appObj)
{
obj.UpdateData(appObj);
}
and in the DAL
public void UpdateData(Appraiser apprObj)
{
try
{
var Appsave = context.Appraisers.FirstOrDefault(App => App.AppraiserId == apprObj.AppraiserId);
if (Appsave != null)
{
Appsave.AppraiserName = apprObj.AppraiserName;
Appsave.AppraiserAppraiserCompanyId = apprObj.AppraiserAppraiserCompanyId;
Appsave.Address = apprObj.Address;
Appsave.City = apprObj.City;
Appsave.ProvinceState = apprObj.ProvinceState;
Appsave.Email = apprObj.Email;
Appsave.Postal = apprObj.Postal;
Appsave.Notes = apprObj.Notes;
context.SaveChanges();
}
}
catch (Exception ex)
{
log.Debug("Appraiser : UpdateData: " + ex.Message + " Trace : " + ex.StackTrace);
}
}
Now I wanto to add a new item through the same combobox and on the button click functionality as it is doing all the work like add, update and delete.
Kindly provide me the hint: This I know that addobject(__) will ve used in place of savechanges etc.
Related
using following code i store images into ArrayList.
public ArrayList getImagesToArray(string qry)
{
ArrayList arr;
if (myConn.State == System.Data.ConnectionState.Closed)
myConn.Open();
if (myDR != null)
myDR.Close();
myComm = new SqlCommand(qry, myConn);
using (myComm)
{
arr = new ArrayList();
myDR = myComm.ExecuteReader();
while (myDR.Read())
{
arr.Add((byte[])myDR[0]);
}
return arr;
}
}
Now i retreive images to an ArrayList using Following Code
ArrayList arrImgs_Main = Q.getImagesToArray("Select FieldImg from InfoTagQA I INNER JOIN PensionScannedDocs P on p.ScanImageID=i.ScanImageID Where P.PersonalNumber='" + hid_PersonalNo.Value + "'");
Now I display image one by one from arrayList to ImageUrl by clicking Next and Previous button
protected void lnk_BackImage_Click(object sender, EventArgs e)
{
try
{
if (arrImgs_Main.Count > 0)
{
if (i > 0)
{
i--;
img_mainImage.ImageUrl = "data:image;base64," + Convert.ToBase64String((byte[])arrImgs_Main[i]);
lab_TotalRecords.Text = "(" + (i + 1) + "/" + arrImgs_Main.Count + ")";
if (i == 0)
{
lnk_ForwardImage.Visible = true;
lnk_BackImage.Visible = false;
}
}
}
}
catch(Exception ee)
{
ShowErrorMsg(ee.Message);
}
}
**All above code works fine and quick on my local machine, but after deployment on server , it take much time in displaying image one by one from array.
Am i doing doing right in above code or going on wrong way. Please guide me **
please help me how to recover it. I used ddlHassection.Items.Clear(); but its not working properly.
using (var context = new SMAPPDBEntities())
{
var addDept = new SMDepartment
{
DepartmentCode = txtDeptCode.Text,
DepartmentName = txtDeptName.Text,
UnitID= Convert.ToInt32( ddlUnitName.SelectedValue),
Description = txtDeptDescription.Text,
DepartmentHead = Convert.ToInt32(ddlDeptHeadName.SelectedValue),
HasSection = Convert.ToBoolean(ddlHasSection.SelectedValue),
Tag= txtDeptTag.Text
};
try
{
context.SMDepartment.Add(addDept);
context.SaveChanges();
}
catch (Exception ex)
{
ex.ToString();
}
}
protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{
DropDownList1.Items.Clear();
}
or
DDL1.ClearSelection();
Dropdown ignors the adding of a default row to list
.CS
private const string DropDownListValue = "[All]";
private const string DropDownListText = "[All]";
private void LoadProduct()
{
try
{
FieldGoalEntities objEntity = new FieldGoalEntities();
IQueryable<Product> objProduct = from p in objEntity.Product
select p;
ddlProduct.Items.Clear();
if (objProduct != null)
{
ddlProduct.DataSource = objProduct;
ddlProduct.DataValueField = "ProductCode";
ddlProduct.DataTextField = "ProductCode";
ddlProduct.DataBind();
}
ddlProduct.Items.Insert(0, new ListItem(DropDownListText, DropDownListValue));
}
catch (Exception ex)
{
Common.LogEvent(Common.LoggingType.Error, "LoadProduct", ex.Message);
Common.ShowMessageBox(this.Master, "Error", "Load Product Status: " + ex.Message);
}
}
//ASPX
//DropdownBox
I need the all added for the filtering, but for some reason if I do the databinding in the .CS file it leaves out the [ALL]
I should call ddlProduct.DataBind(); after you've added All to the Items list
if (objProduct != null)
{
ddlProduct.DataSource = objProduct;
ddlProduct.DataValueField = "ProductCode";
ddlProduct.DataTextField = "ProductCode";
}
ddlProduct.Items.Insert(0, new ListItem(DropDownListText, DropDownListValue));
ddlProduct.DataBind();
I'm trying to write a webpart that basically pulls data from a list and displays it to the user. There is a feature news list where one of the columns holds a URL to an image. The web part should get the 3 most recent feature news items and create three image controls on the page. These image controls can be scrolled through by clicking on the buttons 1,2,3. (Ie, clicking on 2 will set the Visible property of image 1 and image 3 to false).
I have managed to implement AJAX here, but am now trying to use the UpdatePanelAnimationExtender from the AJAX Control Toolkit.
I have followed all instructions on how to use the toolkit, add it to the GAC, add a safe assembly, etc, and have gotten past all the errors besides this one:
"Page cannot be null. Please ensure that this operation is being performed in the context of an ASP.NET request"
My complete code below:
using System; using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.WebControls;
using System.Web.Extensions;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using System.ComponentModel;
using AjaxControlToolkit;
namespace FeatureNewsWebpartFeature {
[Guid("7ad4b959-d494-4e85-b164-4e4231692b8b")]
public class FeatureNewsWebPart : Microsoft.SharePoint.WebPartPages.WebPart
{
private bool _error = false;
private string _listName = null;
private string _imageColumn = null;
Image image1;
Image image2;
Image image3;
UpdatePanelAnimationExtender upAnimator;
[Personalizable(PersonalizationScope.Shared)]
[WebBrowsable(true)]
[System.ComponentModel.Category("List Connection Settings")]
[WebDisplayName("List Name")]
[WebDescription("Enter the name of the news list")]
public string ListName
{
get
{
if (_listName == null)
{
_listName = "News";
}
return _listName;
}
set { _listName = value; }
}
[Personalizable(PersonalizationScope.Shared)]
[WebBrowsable(true)]
[System.ComponentModel.Category("List Connection Settings")]
[WebDisplayName("Image Column Name")]
[WebDescription("Enter the column name of the ArtfulBits Image Upload column")]
public string ImageUrlColumn
{
get
{
if (_imageColumn == null)
{
_imageColumn = "Feature Image";
}
return _imageColumn;
}
set { _imageColumn = value; }
}
public FeatureNewsWebPart()
{
this.ExportMode = WebPartExportMode.All;
}
/// <summary>
/// Create all your controls here for rendering.
/// Try to avoid using the RenderWebPart() method.
/// </summary>
protected override void CreateChildControls()
{
if (!_error)
{
try
{
base.CreateChildControls();
//Create script manager
if (ToolkitScriptManager.GetCurrent(this.Page) == null)
{
ToolkitScriptManager scriptHandler = new ToolkitScriptManager();
scriptHandler.ID = "scriptHandler";
scriptHandler.EnablePartialRendering = true;
this.Controls.Add(scriptHandler);
}
//Create update panel
System.Web.UI.UpdatePanel imageUpdatePanel = new System.Web.UI.UpdatePanel();
imageUpdatePanel.ID = "imageUpdatePanel";
imageUpdatePanel.UpdateMode = UpdatePanelUpdateMode.Conditional;
this.Controls.Add(new LiteralControl("<div id=\"updateContainer\">"));
this.Controls.Add(imageUpdatePanel);
this.Controls.Add(new LiteralControl("</div>"));
//Make SPSite object and retrieve the three most recent feature news items
SPSite site = SPContext.Current.Site;
using (SPWeb web = site.OpenWeb())
{
SPList oList = web.Lists[ListName];
SPQuery oQuery = new SPQuery();
oQuery.RowLimit = 3;
oQuery.Query = "<OrderBy>" +
"<FieldRef Name='Modified' Ascending='False' /></OrderBy>" +
"<Where>" +
"<Eq>" +
"<FieldRef Name='ContentType' />" +
"<Value Type='Choice'>Feature News Item</Value>" +
"</Eq>" +
"</Where>";
oQuery.ViewFields = string.Concat(
"<FieldRef Name='Feature_x0020_Image' />" +
"<FieldRef Name='Feature_x0020_Order' />");
image1 = new Image();
image2 = new Image();
image3 = new Image();
//For each item, extract image URL and assign to image object
SPListItemCollection items = oList.GetItems(oQuery);
foreach (SPListItem oListItem in items)
{
string url = oListItem["Feature_x0020_Image"].ToString();
url = url.Substring(url.IndexOf("/Lists"));
url = url.Remove(url.IndexOf(";#"));
switch (oListItem["Feature_x0020_Order"].ToString())
{
case "1":
image1.ImageUrl = url;
break;
case "2":
image2.ImageUrl = url;
break;
case "3":
image3.ImageUrl = url;
break;
default:
//ERROR
break;
}
}
if (!(Page.IsPostBack))
{
image1.Visible = true;
image2.Visible = false;
image3.Visible = false;
}
imageUpdatePanel.ContentTemplateContainer.Controls.Add(image1);
imageUpdatePanel.ContentTemplateContainer.Controls.Add(image2);
imageUpdatePanel.ContentTemplateContainer.Controls.Add(image3);
//Create animation for update panel
upAnimator = new UpdatePanelAnimationExtender();
upAnimator.ID = "upAnimator";
upAnimator.TargetControlID = imageUpdatePanel.ID;
const string xml = "<OnUpdating>" +
"<Parallel duration=\".25\" Fps=\"30\">" +
"<FadeOut AnimationTarget=\"updateContainer\" minimumOpacity=\".2\" />" +
"</OnUpdating>" +
"<OnUpdated>" +
"<FadeIn AnimationTarget=\"updateContainer\" minimumOpacity=\".2\" />" +
"</OnUpdated>";
Animation.Parse(xml, upAnimator);
this.Controls.Add(upAnimator);
Button b1 = new Button();
b1.ID = "b1i";
b1.Click += new EventHandler(b1_Click);
b1.Text = "Image 1";
Button b2 = new Button();
b2.ID = "b2i";
b2.Click += new EventHandler(b2_Click);
b2.Text = "Image 2";
Button b3 = new Button();
b3.ID = "b3i";
b3.Click += new EventHandler(b3_Click);
b3.Text = "Image 3";
this.Controls.Add(b1);
this.Controls.Add(b2);
this.Controls.Add(b3);
AsyncPostBackTrigger tr1 = new AsyncPostBackTrigger();
tr1.ControlID = b1.ID;
//tr1.EventName = "Click";
imageUpdatePanel.Triggers.Add(tr1);
AsyncPostBackTrigger tr2 = new AsyncPostBackTrigger();
tr2.ControlID = b2.ID;
//tr2.EventName = "Click";
imageUpdatePanel.Triggers.Add(tr2);
AsyncPostBackTrigger tr3 = new AsyncPostBackTrigger();
tr3.ControlID = b3.ID;
//tr3.EventName = "Click";
imageUpdatePanel.Triggers.Add(tr3);
}
}
catch (Exception ex)
{
HandleException(ex);
}
}
}
void b1_Click(object sender, EventArgs e)
{
image1.Visible = true;
image2.Visible = false;
image3.Visible = false;
}
void b2_Click(object sender, EventArgs e)
{
image1.Visible = false;
image2.Visible = true;
image3.Visible = false;
}
void b3_Click(object sender, EventArgs e)
{
image1.Visible = false;
image2.Visible = false;
image3.Visible = true;
}
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
}
protected override void Render(HtmlTextWriter writer)
{
base.Render(writer);
}
/// <summary>
/// Ensures that the CreateChildControls() is called before events.
/// Use CreateChildControls() to create your controls.
/// </summary>
/// <param name="e"></param>
protected override void OnLoad(EventArgs e)
{
if (!_error)
{
try
{
base.OnLoad(e);
this.EnsureChildControls();
// Your code here...
}
catch (Exception ex)
{
HandleException(ex);
}
}
}
/// <summary>
/// Clear all child controls and add an error message for display.
/// </summary>
/// <param name="ex"></param>
private void HandleException(Exception ex)
{
this._error = true;
this.Controls.Clear();
this.Controls.Add(new LiteralControl(ex.Message));
}
} }
Here's a related question though being asked in the context of SP 2010, it's still directly applicable given the solution.
We have a CQWP on our MOSS farm that does essentially the same thing: reads items from a list using jQuery and the SPServices plugin and animates slider changes. The most difficult part of the process is actually tweaking the look, if I remember correctly. Once you have the right pieces, putting it together is a snap.
I keep getting the following error and I don't know how to fix it. Any help would be great please
Exception Details:NullReferenceException was unhandled by users code: Object reference not set to an instance of an object.
protected void LbUpload_Click(object sender, EventArgs e)
{
ERROR: if(FileUpload.PostedFile.FileName == string.Empty)
{
LabelMsg.Visible = true;
return;
}
else
{
string[] FileExt = FileUpload.FileName.Split('.');
string FileEx = FileExt[FileExt.Length - 1];
if (FileEx.ToLower() == "csv")
{
FileUpload.SaveAs(Server.MapPath("CSVLoad//" + FileUpload.FileName));
}
else
{
LabelMsg.Visible = true;
return;
}
}
CSVReader reader = new CSVReader(FileUpload.PostedFile.InputStream);
string[] headers = reader.GetCSVLine();
DataTable dt = new DataTable();
foreach (string strHeader in headers)
dt.Columns.Add(strHeader);
string[] data;
while ((data = reader.GetCSVLine()) != null)
dt.Rows.Add(data);
GridView1.DataSource = dt;
GridView1.DataBind();
if (FileUpload.HasFile)
try
{
FileUpload.SaveAs(Server.MapPath("confirm//") +
FileUpload.FileName);
LabelGrid.Text = "File name: " +
FileUpload.PostedFile.FileName + "<br>" +
FileUpload.PostedFile.ContentLength + " kb<br>" +
"Content type: " +
FileUpload.PostedFile.ContentType + "<br><b>Uploaded Successfully";
}
catch (Exception ex)
{
LabelGrid.Text = "ERROR: " + ex.Message.ToString();
}
else
{
LabelGrid.Text = "You have not specified a file.";
}
File.Delete(Server.MapPath("confirm//" + FileUpload.FileName));
}
You are checking if the FileName is string.Empty, it sounds like you want to detect when the user clicked the button without selecting a file.
If that happens, the actual PostedFile property will be null (remember, the user didn't posted a file), you should use the FileUpload.HasFile property for that purpose:
protected void LbUpload_Click(object sender, EventArgs e)
{
if(FileUpload.HasFile)
{
LabelMsg.Visible = true;
return;
}
// ...
}
But I would recommend you also to add a RequiredFieldValidator.
More on validation:
Validating ASP.NET Server Controls
ASP.NET Validation in Depth
Are you sure that FileUpload and FileUpload.PostedFile is not null?
Either FileUpload or its PostedFile property must be null.