C# - Bind An ExecuteReader Command To A Dropdownlist So The User Can Select A Value?
Apr 8, 2010
After trying many solutions listed on the internet I am very confused now. I have a C#/SQL web application for which I am simply trying to bind an ExecuteReader command to a Dropdownlist so the user can select a value. This is a VS2008 project on an XP OS.
How it works is after the user selects a table, I use this selection as an input parameter to a method from my Datamatch.aspx.cs file. Then this Datamatch.aspx.cs file calls a method from my ADONET.cs class file. Finally this method executes a SQL procedure to return the list of columns from that table. (These are all tables in Adventureworks DB). I know that this method returns successfully the list of columns if I execute this SP in SSMS. However, I'm not sure how to tell if it works in VS or not.This should be simple. How can I do this? Here is some of my code. The T-sQL stored proc:
CREATE PROCEDURE [dbo].[getColumnNames]
@TableName VarChar(50) AS
BEGIN
SET NOCOUNT ON;
[code]...
The CreateLabels method above correctly shows me the labels. But the CreateDropDownLists method just shows me one dropdownlist with nothing in it. In other words, it is not selectable. So how can I verify that the datareader is returning all 4 columns and inspect their values? I was able to find from datareader "COLUMN_NAME" but I don't know what properties to search to verify the column names.
I would like to know if I can do the following: when I am in insert mode, can I dynamically change the select command of and then display that result in the second dropdownlist based on what was selected in the first dropdownlist.
I would like to include the minimum code to demonstrate what I am trying to do.
Two ddl inside gridview. on selecting first ddl1 fill next ddl2 by passing selected value as parameter by executing the sqldatasource select command in codebehind.code:
GridViewRow gr = (GridViewRow)((DataControlFieldCell)((DropDownList)sender).Parent).Parent; //find the control in that DropDownList d1 = (DropDownList)gr.FindControl(ddl1); DropDownList d2 = (DropDownList)gr.FindControl(ddl2); SqliaDataSource.SelectParameters.Add("@name", d1.SelectedItem.Text.ToString()); dataView dv=(dataview) SqliaDataSource.select(DataSourceSelectArguments .Empty); Error: There is no source code available for the current location. and Returns null value
Description: An error occurred during the parsing of a resource required to service this request. review the following specific parse error details and modify your source file appropriately.
I want to issue an INSERT command for an SQL Server table using DataAdapter without first issuing a SELECT command. Could anybody send me lines of code to handle this? Also how do i manage INSERT into selective table columns (I have 10 columns but i only want to update 2 of them)?
I've recently started working in ASP.NET and RDBMS.I'm making a test form where I can do basic add,update,delete operations.I'm using OracleDataClient to do the DB operations.I was able to populate a listbox using OracleDataAdapter.
Now after clicking on update button,I intend to Update in DB.I've Dataadapter with it's update property.But the update query is not happening.The examples I saw over net all have Select command before Update.Is it actually like that or am I missing some point.
How does Oracle DataClient work with Insert,Update,Delete Commands.
i create example using Northwind database so i create a new website and add new ADO.Net Entity Data Model (.edmx) called Northwind.edmx and i add Categories and Products table inside this (.edmx) file
and add new ADO.Net Data Servuce called "ADODataService" and add it as WebReferences called NorthwindService
so i add new web page and drag DropdownList and Gridview as i want to bind Dropdownlist to all categories and when i select category from Dropdownlist bind Gridview to all Products related to this category
so my code
[Code]....
and my code [Code]....
so when i select category from Dropdownlist nothing happen :(
also you will find commented code in method BindCategory whuch is not work also.
I have gridview. some columns are data, and some are link buttons. now, I need move these link buttons to a hovermenu. this is done. but I got a javascript exception, and it is because if there is no row was selected in gridview, it will pop this.
so, the question is: how can I select a row in gridview without select command? simply by code?
i'm trying to issue a select command in my app soi could execute the command and retrive the data into a string variable.the problem is that this command is overloaded with DataSourceSelectArgument and i can't figure out what it is.i'm using sql server express and when issue a n insert command for example sq.Insert(); i have no problems.this the command that's holding me:
SqlDataSource sq = new SqlDataSource(); sq.ConnectionString = ConfigurationManager.ConnectionStrings["CustomerDatabaseConnectionString1"].ToString(); sq.SelectCommandType = SqlDataSourceCommandType.Text; sq.SelectCommand = "SELECT * FROM CustomerTable where customerID = 1"; string result = sq.Select(some overload that's stopping me);
I want to use a dropdownlist control so that a user can select a value. My problem is, the text value can be very large. Is there any way to make the text to appear on more than one line? Or is there any AJAX or jquery solutions? I can use a gridview with a checkbox but my client really wants a dropdownlist.
I have 2 Dropdown(say "DD1", "DD2") and 1 Listbox(say "LB") in my web form,value of the 3 controls depend on each other.
"LB1" is dependent on "DD2" value, "DD2" is dependent on "DD1" value.
I want that if user selects "LB1" without selecting "DD2", it should give a message that "please select DD2 first"similarly if user Selects "DD2" without selecting "DD1", it should give a msg that "Please select DD1 first" ,using ASP.NET C.
I'm building a pretty simple application where a user can enter/modify/delete data from a table. Right now, the only field is month, which I'm storing as an integer (1-12). The actual table has more fields but I'm simplifying for the purposes of this question.I have the entry part. For modifying, I've set up a gridview with an 'Edit' button:
[Code]....
The code is putting the gridview row into edit mode. Now, I want to show a dropdownlist of months so the user can select the new month. Also, I would like the dropdownlist to default to the value in the database. I can't figure out how to bind months to the dropdown list ddlMonth.
DDL3.Items.Insert(0, new ListItem(" please select ", "0"));
I have button in my page that when user click on it insert data into database
Here when users didn't select Item from dropdownlist it insert "please select" ( text that I define for DDL ) into database but I want when users didn't select Item from database it insert NULL in database....
I have created a web application and generated local resources. Its working when user select language from browser. But what i want is, when user select language from dropdown list, i want to change the pages according to selected language. i can save user selected language in a session. then how should I change/assign local resource file to web page?
I have a gridview with 3 nested dropdownlists in one cell on edit like this:To get the exact fields when the user clicks on edit I used the following code(yes it's messy)
[Code]....
The BLLOnderhoud is a class and the getReserveInfo is used to get the Model - Brand(merk) Information.Since the dropdownlists are nested in the gridview I can't call them directly and they can't call any of my functions.And this is the problem, when I change the dropdownfield Model the Auto field wich is the last dropdown(in the picture is a typo) should be binded like in the following code:
[Code]....
But the dropdownlist onDataBound event can't call any of my functions that are in my class.So my question is how can the onDataBound event of the second dropbox trigger a function? The only thing that the function has to do is to bind the 3rd dropdownlist
In regular old visual c#, if I wanted to select all the text in a text box I would use testbox.SelectAll(); (or something like that, can't remember if that's the right method name).
In asp I can use focus() to put the typing cursor in the check box, but I can't for the life of me figure out how to select everything in the box so that the user doesn't have to highlight it to start over.
Is there anyway to capture the command the Gridview is executing for later use? I have gridview that uses parameters from a few textboxes, so its generating a custom statement. I am wondering is there anyway for me to get that statement either during or after it is executing it, and then returning the results. I need to save it, so that I can populate a CSV file with the data that was returned?
Is it possible to have multiple conditions in an SQL select command. I have an SQL Table with the follwing filds.
Image1 Image1Approved Image2 Image2Approved Etc
Image1 is a varchar(50) and stroes the picture name. Image1Approved is a tinyint (0 = Pending, 1 = Declined & 2 = Approved) I am using the following to query the SQL database.
SelectCommand="SELECT Image1, Image1Approved, Image2, Image2Approved, Image3, Image3Approved FROM UserProfiles WHERE (UserId = @UserId)"
The part that I am stuck on is only returning the images that have there associated approved condition set. I know how to do this with a seperate select command for each image but can this be done for all image files in one statement.
In my DB some tag will get automatically concatenate with original value, this will happen in few tables and in few columns(nvarchar type).What will i do for avoiding this.Here is that tag:
I have a table and on this table I have two column showing NumberOfDays and TotalPrice. I have my select command just like below;
"Select ([NumberOfDays]*[TotalPrice]) as MyResult From MyDatabase Order By [MyResult]"
My aim here is to create a new data depanding on 'MyResult' value. If MyResult value is under 10, I want a data value as 'False'. Else, I want a data value as 'True'. How could I write it in sql code?
