Web Forms :: Want To Return Unique Values
Mar 18, 2010
I have a text box that has values separated by a comma. I am trying to remove the duplicate values for, example this text box will have values like:
John, Adam, Mike, John, Mike
I want it to return unique values like:
John, Adam, Mike
I found a VB function and converted it to C# but it's giving me errors like newArray is a variable but used as a method. Thanks
public string RemoveDuplicates(string items)
{
StringBuilder Result = new StringBuilder();[code]....
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Jun 11, 2010
I have an SQL database table like the following:
ID // Code // Shape
The ID is the integer identifier.
On one line the Code may be OX01 and shape Hexagon for example
Then the next line the code is still OX01 but the shape is Triangle.
What I want to do is be able to pull back data for every line that is equal to a unique Code column. in the above example OX01 Hexagon would be returned but not OX01 Triangle.
I've tried using SELECT DISTINCT but it brings back all records and doesn't filter them correctly.
I've considered having another column which could have Child/Parent data so that only the parent is returned but i'm sure there must be a better way of doing this.
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Oct 4, 2010
In given code finally I want to populate unique values at runtime in 2 drop downlist.
protected void Page_Load(object sender, EventArgs e)
{
vidDocument.Load(Server.MapPath("~/CurrentStatus.xml"));
HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ExpiresAbsolute = DateTime.Now.AddMonths(-1);
[Code]....
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Nov 7, 2010
I need to loop through an XML document (no problem over there) and check if a value that i find is already in a (a) tag in a div in my XSL document that i am generating, only if the value is not in that (a) tag i should create a new (a) tag for it and put in in the div that i am checking... how to do it dynamically in XSLT?
<div id="tags"><span class="l_cap"> </span>
<a href="#" class="current">all</a>
<xsl:for-each select="root/nodes/node/data/genres">[code]....
what i am trying to do is: in the if statement, check if the current value is already exist in the div if not, add it, if is, don't do anything...
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Aug 7, 2010
I know this is a newbie question but, alas , that's what I am. How do I keep values in specifc sql server table unique, in other words how do I prevent any duplicates happening upon creating (inserting) a new table row?
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Aug 25, 2010
Is GUID (globally unique identifier) really unique, or it can be duplicate.
System.Guid.NewGuid().ToString()
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Feb 21, 2011
I am geting a json value with multiple stateid amd more statid are multiple,but I want stateid only unique(distinct) in jquery array.
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May 3, 2010
I am returning a dataset from a method and trying to set one of the columns as Primary Key.
CategoryList.Tables[0].PrimaryKey = new DataColumn[] { CategoryList.Tables[0].Columns["CategoryNodeId"] };
Interestingly it gives me this error at run-time, These columns don't currently have unique values.
Now I perfectly know why this error should error, but there are no duplicate keys in this data column. I broke the code in between and bound the dataset to gridview to check if this column contains any duplicates and this is not the case. Here is the result set underneath. Have a look at the first column 'CategoryNodeId'.
CategoryNodeId
CategoryId
Name
ParentCategoryNodeId [code]...
unable to find a work around for now.
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Sep 30, 2010
I'll try to make this concise. Anyways, I'm trying to only allow unique data to my database. my database. What I did before adding the entry is to use a Search Query for the value of the txtbox
"SELECT IDnum WHERE IDnum = '" & txtID & "'"
Then compare it with that of the txtbox.
IF objReader("IDNum") <> txtID.textbox then add the entry Else Display a Warning.
in the above code, I can detect the when the user entered an existing value. however, If the user entered a NEW (unique) value an error is Raised "Invalid attempt to read when no data is present" I hit the wall with this.So what I did, Since I can detect Duplicates and have errors when entering unique value, I used the
ON ERROR GOTO statement: I did it like this.
On Error Goto errHandler
If objReader("IDNum") = txtID.textbox then
lbl1.text = "Existing Record"
objReader.close() [code]....
The Code does what I need but its kinda long, I bet there is an elegant way to do this.
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Feb 11, 2010
I've got a database table with a very large amount of rows. This table represents messages that are logged by a system. Each message has a message type and this is stored it it's own field in the table. I'm writing a website for querying this message log. If I want to search by message type then ideally I would want to have a drop down box listing the message types that have come up in the database. Message types may change over time so I can't hard code the types into the drop down. I'll have to do some sort of lookup. Iterating over the entire table contents to find unique message values is obviously very stupid however being stupid in the database field I'm here asking for a better way. Perhaps a separate lookup table which the database occasionally updates listing just the unique message types that I can populate my drop down from would be a better idea.
The platform I'm using is ASP.NET MVC and SQL Server 2005
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Apr 4, 2011
How does System.Guid.NewGuid() know that the values it generates are unique, for example when i use in a loop?Does it internally store data somewhere? .
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Nov 12, 2010
I need a way to create unique values for a property in my custom server control..
In this case I will have the poroperty called "Name" and I neeed the value of Name to be unique for each "instance" of the control...
So for instance if I have a page with more then one instance of the control, I dont want the value of the Name property for these instances to be allowed to be the same..
...to put it kind of simple, if I dont remember this incorrect, I want it to be sort of like the ID property..but with another name then ID.
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May 7, 2015
This is my UserRoleList.aspx.cs Code where i am passing the session variable to the page Default.aspx.cs..
And the error is: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints. I have gone through many pages , and tried by making the AllowDbNull property making True and then different things.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
[code]...
This is the code of the second page Default.aspx.cs where i have to user the session varaible to pass in the SQL fucntion named GetDataByUserId as shown below:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
[Code] ....
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Oct 19, 2010
I have been reading that a value needs to be returned by a function, otherwise the following error will occur:
"Function <function name> doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used."
The cure, I have found, is to return something (i.e. "Return 0") before exiting the function. Can I pass this return value back to the routine that called the function? If so, how do I code this?
Most of the time, however, I find I'm not needing to return a value anyway, and just end up adding "0" to the ends of all my Return statements. Does anyone have any comments on this?
Links referred to:
[URL]
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Mar 26, 2016
Multiple DropDownList in GridView populated with unique values in ASP.Net
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Apr 8, 2014
openDB() Dim inList As String Dim getCourses
For k As Integer = 0 To arLcID.Count - 1
If k > 0 Then inList &= ","
End If inList = arLcID(k).ToString
getCourses = "select cID,cCode,cUnit from [university].[Courses_1] where cID ='" & inList & "'"
insertCMD = New Data.SqlClient.SqlCommand
[Code] ....
This code is not returning any value, when the arraylist is removed it returns value.
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Jun 8, 2010
I am using Stored Procedure as my Insert/Update command in a FormView. The sp returns a value which I will need to use. How do I retrieve the value after doing an insert / update?
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Nov 23, 2010
How to get Unique ID of LDAP logged in User? Is GUID is the unique id of each user?
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Feb 25, 2011
i've got a gridview and sql datasource. Its connected to a stored proc that has four optional parameters. In VS when i set up the data source, if i use the test option, and dont supply any values for the sproc, it returns all the values in the table which is what it should do. Now when i try to fill the gridview, it wont return anything at all unless i provide values for all 4 parameters.
It's not even trying to search because i had sql profiler open and nothing shows up until i provide all 4 values. any idea why it's doing this? How do i get it to actually bind even if provide less then all 4 (or none) of the values?
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Jan 25, 2010
I have a multiple page gridview and edit link on each row.
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Mar 21, 2011
How generate the unique no. 1,2,3 and so on .... on button click of each new user ..
the code mentioned below is a readwrite coding in vb.net ...
but the problem is it generate the same id for different users on button click event... but i want the no. of times button clicked the new ids will be generated
[code]....
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Mar 28, 2010
I have a grid view and I added edit and Save buttons to it. When I click on edit I am able to edit the data but when I click on save I amgetting the data before edit.
Please see my code below.
Eg: I have start date as 2005-10-10 12:00 AM so After I click On edit it is letting me to edit, So If I edit the start date to 2010-10-10 12:00 PM and click on the save button I am stil getting the old start date. which is 2005-10-10 12:00 AM instead of 2010-10-10 12:00 PM
<asp:GridView ID="gvPosHistory" runat="server" AutoGenerateColumns="False" AllowPaging="True"
AllowSorting="true" Width="650px" PageSize="20" CssClass="Gridview" Visible="false"
OnRowCommand="gvPosHistory_RowCommand"
OnRowDataBound="gvPosHistory_RowDataBound"
OnRowEditing="gvPosHistory_RowEditing"
OnRowUpdating="gvPosHistory_RowUpdating"
onrowcancelingedit="gvPosHistory_RowCancelingEdit" >
<Columns>
<asp:TemplateField HeaderText="Start Date" SortExpression="startDate">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblstartdate" runat="server" text='<%# Eval("StartDate")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtStartDate" runat="server" Text='<%# Bind("StartDate")%>' ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="End Date" SortExpression="endDate">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblenddate" runat="server" text='<%# Eval("EndDate")%>' ></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtEndDate" runat="server" Text='<%# Bind("EndDate")%>' ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Functional Job Title" SortExpression="JobTitle">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblFunctjobTitle" runat="server" text='<%# Eval("FunctionalJobTitle")%>' ></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtFuncJobTitle" runat="server" text='<%# Bind("FunctionalJobTitle")%>' ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Department" SortExpression="Department">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblDepartment" runat="server" text='<%# Eval("DeptName")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtDeptName" runat="server" Text='<%# Bind("DeptName")%>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Supervisor" SortExpression="Supervisor">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblSupervisor" runat="server" text='<%# Eval("Supervisor")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtSupervisor" runat="server" Text='<%# Bind("Supervisor")%>' ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Bargaining Unit" SortExpression="bargainingunit">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblbargainingunit" runat="server" text='<%# Eval("BargainingUnit")%>' ></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtBargainingUnit" runat="server" text='<%# Bind("BargainingUnit")%>' ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="UCP Level" SortExpression="UCPlevel">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center"
VerticalAlign="Top" />
<ItemStyle Wrap="False" HorizontalAlign="Left" />
<ItemTemplate>
<asp:Label ID="lblUCPlevel" runat="server" text='<%# Eval("UCPLevel")%>' ></asp:Label>
</ItemTemplate>
<EditItemTemplate >
<asp:TextBox ID="txtUcpLevel" runat="server" Text='<%#Bind("UCPLevel")%>' ></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Edit" SortExpression="Edit">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center" VerticalAlign="Top" />
<ItemStyle Wrap="True" HorizontalAlign="Left" />
<ItemTemplate>
<asp:LinkButton ID="LBPosHistoryEdit" Text="Edit" runat="server" CommandName="Edit" ></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Save" SortExpression="Save">
<HeaderStyle Wrap="False" Font-Bold="True" HorizontalAlign="Center" VerticalAlign="Top" />
<ItemStyle Wrap="True" HorizontalAlign="Left" />
<EditItemTemplate>
<asp:LinkButton ID="LBPosHistorySave" Text="Save" runat="server" CommandName="SavePosHistory" CommandArgument='<%# Eval("UCPLevel")%>' ></asp:LinkButton>
</EditItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
.aspx.cs
protected void gvPosHistory_RowCommand(object source, GridViewCommandEventArgs e)
{
if (e.CommandName == "SavePosHistory")
{
string arg = Convert.ToString(e.CommandArgument);
System.Web.UI.WebControls.LinkButton btnPosHistory = e.CommandSource as System.Web.UI.WebControls.LinkButton;
GridViewRow row = btnPosHistory.NamingContainer as GridViewRow;
TextBox tSdate = row.FindControl("txtStartDate") as TextBox;
TextBox tEdate = row.FindControl("txtEndDate") as TextBox;
TextBox tFuncJobTitle = row.FindControl("txtFuncJobTitle") as TextBox;
TextBox tDeptName = row.FindControl("txtDeptName") as TextBox;
TextBox tSupervisor = row.FindControl("txtSupervisor") as TextBox;
TextBox tBargainingUnit = row.FindControl("txtBargainingUnit") as TextBox;
TextBox tUCPLevel = row.FindControl("txtUcpLevel") as TextBox;
}
}
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Mar 18, 2011
How can I get unique session ID for every unique user who logs in ?? I'm using asp.net/c#
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Feb 11, 2010
How To Display Data In Following Format?
In the Format below abc has multiple occurance which count is displayed in brackets as 2669.
[code]....
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Jan 28, 2011
i have to call an executable in the client machine in asp.net and get the return parameters, i been looking for an example but i couldn't find it.
it this possible to recover the output parameters from one exe in JavaScript?
i know that can i write:
var WshShell = new ActiveXObject("WScript.Shell");
var oExec = WshShell.Exec("My.exe");
but the clients executable returns 0 or 1 that values are the ones i need to collect
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