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N!dh!sh - Professional Profile

@NET-Codes-by-NC


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This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.
 
Member 7963336

India India

700 points
Member since Sun 29 May 2011
(13 years)

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ActionAuthorAuthorityDebatorEditorEnquirerOrganiserParticipantIf OwnerMember Types
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Bypass spam checks when posting contentsilversilversilversilversilversilvergoldSubEditor, Mentor, Protector, Editor
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First Prev Next
GeneralExport Pin
N!dh!sh13-Nov-12 6:48
N!dh!sh13-Nov-12 6:48 
GeneralGridview Pin
N!dh!sh10-Oct-11 4:57
N!dh!sh10-Oct-11 4:57 
GeneralCode Tips 3 [modified] Pin
N!dh!sh12-Aug-11 3:47
N!dh!sh12-Aug-11 3:47 
GeneralCodeTips 2 [modified] Pin
N!dh!sh4-Jul-11 0:53
N!dh!sh4-Jul-11 0:53 
1) Upload File
2) To restrict usage of backbutton
3) To pass xml data as a parameter of an SP
4) To change actual URL
5) Dropdown list selected index changed event not fired after page validation failure
6)Return multiple values from a popup
7)Javascript to enable a disabled checkbox
8)CommandName, CommandArgument and Text properties of a linkbutton (in gridview)
9)To delete a row in a datatable
10)To find and change properties of a control in master page
11)Hide an image in a gridview column based on another column text
12)Set super admin in web.config
------------------------------------------------------------------------------------------
1)Upload File

a) Add below code in web.config to avoid problems related to uploading files greater than 4MB,
<system.web>
<httpRuntime maxRequestLength="2097151" requestLengthDiskThreshold="2097151"/>
</system.web>

b)Validate file to upload

i)Method 1:

public Boolean ValidateFile()
{
if (fupload.FileName = = string.Empty)
{
lblErrorMessage.Text = "Please select a file to upload";
return false;
}
else if (Convert.ToInt64(fupload.PostedFile.ContentLength) > 5242880)
{
lblErrorMessage.Text = "File size should be less than 5 MB";
return false;
}
else
{
string strExtension = Path.GetExtension(fupload.PostedFile.FileName).ToString().ToUpper();
string[] validfiles = new string[] { ".PNG", ".JPG" };
foreach (string s in validfiles)
{
if (s == strExtension)
return true;
}
return false;
}
}

ii)Method 2:

Add below code in web.config,
<appSettings>
<add key="ValidFiles" value=".TXT,.DOC,.DOCX,.XLS,.PDF,.JPG,.PNG" />
</appSettings>

Add below code in .aspx.cs page,
public Boolean ValidateFile()
{
string strExtension = "," + Path.GetExtension(fupload.PostedFile.FileName).ToString().ToUpper() + ",";
string strValidFiles = ","+ConfigurationManager.AppSettings["ValidFiles"].ToString()+",";
if (strValidFiles.IndexOf(strExtension.Trim().ToUpper()) != -1)
return true;
else
return false;
}

c) Store uploaded file in folder with a unique name

Method 1:

string strGuid = Convert.ToString(Guid.NewGuid());
string strOriginalFilename, strUniqueFilename;
strOriginalFilename = Path.GetFileName(fupload.FileName);
strUniqueFilename = strGuid + "." + Path.GetExtension(fupload.FileName);

fupload.PostedFile.SaveAs(Server.MapPath("~\\UploadedFiles") + "\\" + strUniqueFilename);

Method 2:

string strOriginalFilename, strUniqueFilename;

strOriginalFilename = Path.GetFileName(fupload.FileName);
strUniqueFilename = DateTime.Now.Ticks.ToString() + "_" + Path.GetFileName(fupload.FileName);
fupload.PostedFile.SaveAs(Server.MapPath("~\\UploadedFiles") + "\\" + strUniqueFilename);

d)View uploaded file

protected void lbnFilename_OnClick(object sender, EventArgs e)
{
string strFilePath = Server.MapPath("~//UploadedFiles") + "\\" + hfUniqueFilename.Value;
if (System.IO.File.Exists(strFilePath) == true)
{
Response.Clear();
Response.AppendHeader("content-disposition", "attachment; filename=" + hfFilename.Value);
Response.ContentType = "application/href";
Response.WriteFile(Server.MapPath("~//UploadedFiles") + "\\" + hfUniqueFilename.Value);
Response.Flush();
Response.End();
}
}

e) Delete an uploaded file from the local folder

string strFolderPath = Server.MapPath("~//UploadedFiles ") + "\\" + strUniqueFilename;
if (System.IO.File.Exists(strFolderPath))
System.IO.File.Delete(strFolderPath);
----------------------------------------------------------------------------------------
2)To restrict usage of backbutton

<script type="text/javascript">
function noBack(){window.history.forward()}
noBack();
window.onload=noBack;
window.onpageshow=function(evt){if(evt.persisted)noBack()}
window.onunload=function(){void(0)}
</script>
----------------------------------------------------------------------------------------
3)To pass xml data as a parameter of an SP
Step 1:
Create a datatable with needed columns and add it to a dataset and add its contents to a string
string[] strHoliday=new string[1];
DataTable dt = new DataTable();
dt.Columns.Add("DocID");
dt.Columns.Add("FromDate");
dt.Columns.Add("ToDate");

DataRow dr;

for(int i=0;i<lbxHolidays.Items.Count;i++)
{
dr = dt.NewRow();

strHoliday = lbxHolidays.Items[i].ToString().Split(new string[] { "to" }, StringSplitOptions.None);
dr["DocID"] = hfSelectedID.Value;
dr["FromDate"] = strHoliday[0];
dr["ToDate"] = strHoliday[1];
dt.Rows.Add(dr);
}
DataSet ds = new DataSet();
ds.Tables.Add(dt);
string strXmlHolidayList = ds.GetXml();
(pass strXmlHolidayList as parameter of SP)
Step 2: Insert XML datas to SQL table
@HolidayList VARCHAR(MAX)=null,
@idoc INT=null
AS
BEGIN
EXEC sp_xml_preparedocument @idoc OUTPUT, @HolidayList

INSERT INTO Tutorial_InsertXmlData
SELECT * FROM OPENXML (@idoc, '/NewDataSet/Table1',2)
WITH (DocID int,FromDate datetime,ToDate datetime)
-----------------------------------------------------------------------------------------
4)To change actual URL
Step 1:
Add Global Application Class and include below code,
void Application_BeginRequest(object sender, EventArgs e)
{
Rewriter.Process();
}
Step 2:
Add a class Rewriter.cs and include below code
public class Rewriter
{
protected XmlNode _oRules = null;
private const int Id=0;
public Rewriter(string url, int value)
{
HttpContext.Current.Response.Redirect(url);
}

protected Rewriter()
{
}

public string GetSubstitution(string zPath)
{
if (zPath.EndsWith("a")) //here 'a' is the duplicate path and it is given inside response.redirect
return zPath.Replace(zPath, "ImageUpload.aspx?id=1");
if (zPath.EndsWith("b"))
return zPath.Replace(zPath, "FileUpload.aspx?id=1");
return zPath;
}

public static void Process()
{
Rewriter oRewriter = new Rewriter();
string zSubst = oRewriter.GetSubstitution(HttpContext.Current.Request.Path);
if (zSubst.Length > 0)
{
HttpContext.Current.RewritePath(zSubst);
}
}
}
----------------------------------------------------------------------------------------
5) Dropdown list selected index changed event not fired after page validation failed.
Include onchange="Page_BlockSubmit = false;"
----------------------------------------------------------------------------------------
6)Return multiple values from a popup
In .aspx main page,
<script language="javascript" type="text/javascript">
function OpenPersonList()
{
var urlPath = 'Persons.aspx?';
var height = 155;
var width = 400;
var sizestring = 'dialogHeight:' + height + 'px;dialogWidth:' + width + 'px;center:Yes;scroll:No;status:No;edge:Raised;';
var retValue = window.showModalDialog(urlPath, '', sizestring);
var retvalues = new Array();
retvalues = retValue;
if (retvalues != null && retvalues.length >= 1) {
document.getElementById('<%=hfPersonID.ClientID %>').value = retvalues[0];
document.getElementById('<%=hfPersonName.ClientID %>').value = retvalues[1];
return true;
}
else
return false;
}
</script>

In .aspx.cs main page,
protected void btnSearch_Click(object sender, EventArgs e)
{
string[] strName = hfPersonName.Value.Split(',');
string[] strIDs = hfPersonID.Value.Split(',');
for (int i = 0; i < strName.Length; i++)
{
ListItem item = new ListItem(strName[i], strIDs[i]);
if (lbxSelectedPersons.Items.Contains(item) == false)
{
lbxSelectedPersons.Items.Add(item);
}
else
MessageBox.Show("Designtaed Person is already added to the list.");
}
hfPersonName.Value = "";
hfPersonID.Value = "";
}

In .aspx of popup page,
<script language="javascript" type="text/javascript">
function handleActionPopUp(id, name)
{
if (form1.hfAction.value == "Y")
{
var retvalues = new Array();
retvalues[0] = document.getElementById('hfPersonID').value;
retvalues[1] = document.getElementById('hfPersonName').value;
window.returnValue = retvalues;
window.close();
}
}
</script>

<body onload="handleActionPopUp(0,0);">

In .aspx.cs of popup page,protected void btnSelectClose_Click(object sender, EventArgs e)
{
string strIDs = "", strNames = "";
for (int i = 0; i < gvPersons.Rows.Count; i++)
{
CheckBox cbox = gvPersons.Rows[i].FindControl("chkSelect") as CheckBox;

if (cbox.Checked)
{
strIDs += (gvPersons.Rows[i].Cells[1].Text + ",");
strNames += (gvPersons.Rows[i].Cells[2].Text + ",");
}
}
if (strNames.Length > 0)
{
strNames = strNames.Substring(0, strNames.Length - 1);//to remove last comma
strIDs = strIDs.Substring(0, strIDs.Length - 1);
hfPersonName.Value = strNames;
hfPersonID.Value = strIDs;
hfAction.Value = "Y";
}
else
Page.ClientScript.RegisterStartupScript(this.GetType(),"alert","alert('Please select atleast one person to be added.')",true);
}
------------------------------------------------------------------------------------------
7)Javascript to enable a disabled checkbox
function ChkEnabled()
{
var a = document.getElementById('<%=CheckBox1.ClientID %>');
a.disabled = false;
if(a.parentElement.tagName == 'SPAN' && a.parentElement.disabled == true)
a.parentElement.disabled = false;
}
------------------------------------------------------------------------------------------
8)CommandName, CommandArgument and Text properties of a linkbutton (in gridview)

In .aspx page,
<ItemTemplate>
<asp:LinkButton ID="lbtnAttachments" runat="server" CommandArgument='<%#Eval("UpdatedOn") %>' CommandName='<%#Eval("UniqueFilename") %>' Text='<%#Eval("OriginalFilename") %>'
OnClick="lbtnAttachments_Click"></asp:LinkButton>

</ItemTemplate>

In .aspx.cs page,
protected void lbtnAttachments_Click(object sender, EventArgs e)
{
LinkButton obj = (LinkButton)sender;
string x = obj.CommandName.ToString();
string y = obj.CommandArgument.ToString();
}
------------------------------------------------------------------------------------------
9)To delete a row in a datatable
for (int i = 0; i < dt.Rows.Count; i++)
{
if (Convert.ToString(dt.Rows[i]["ID"].ToString()) == "3") {
dt.Rows[i].Delete();
dt.AcceptChanges();
}
}
------------------------------------------------------------------------------------------
10)To find and change properties of a control in master page
In child page, include below code,

In Page_Load,
Button objMPButton = (Button)FindControlRecursive(this, "btnMapProcess");
if (objMPButton != null)
objMPButton.CssClass = "TConfigSelected";

And add below function,
public Control FindControlRecursive(Control Root, string Id)
{
if (Root.ID == Id)
return Root;
foreach (Control Ctl in Root.Controls)
{
Control FoundCtl = FindControlRecursive(Ctl, Id);
if (FoundCtl != null)
return FoundCtl;
}
return null;
}
--------------------------------------------------------------------------------------------
11)Hide an image in a gridview column based on another column text
protected void gv_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRowView drv = (DataRowView)e.Row.DataItem;
string strPriority = drv["ColumnName"].ToString();
Image img = (Image)e.Row.FindControl("imgName");
if(strPriority= ="a")
img.visible=false;
}
}
--------------------------------------------------------------------------------------------
12)Set super admin in web.config

In web.config,
<appSettings>
<add key="SuperAdminName" value="n"/>
<add key="SuperAdminPassword" value="nc"/>
</appSettings>

In master.aspx,
string strSuperAdminName = ConfigurationManager.AppSettings["SuperAdminName"].ToString();
string strSuperAdminPassword = ConfigurationManager.AppSettings["SuperAdminPassword"].ToString();
if(Session["Name"]= =strSuperAdminName && Session["Password"] = = strSuperAdminPassword )
{
}
--------------------------------------------------------------------------------------------

modified on Wednesday, August 10, 2011 5:45 AM


modified 11-Oct-11 3:17am.
GeneralResize uploaded image [modified] Pin
N!dh!sh1-Jul-11 0:40
N!dh!sh1-Jul-11 0:40 
GeneralUseful Links [modified] Pin
N!dh!sh30-May-11 21:19
N!dh!sh30-May-11 21:19 
GeneralCode Tips [modified] Pin
N!dh!sh29-May-11 21:23
N!dh!sh29-May-11 21:23 
Last Visit: 31-Dec-99 18:00     Last Update: 30-May-24 11:14Refresh1

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