ADO.NET :: Retrieve Value From Datatable To A String In C#?
Feb 2, 2011
What is wrong with this code?errors: string myname = dt.Rows[i][0]; - Cannot implicitly convert type 'object' to 'string'. An explicit conversion exists (are you missing a cast?)I tried the followingobject myname = dt.rows[i][0]; --if i use object instead of string, i had no errors.How do i retrieve the value from a datatable column into a string in c#?Error2 - if (Name = myname)Cannot implicitly convert type 'string' to 'bool'
[Code]....
View 1 Replies
Similar Messages:
Mar 23, 2011
I wish to retrieve data from a DataTable using Linq, and I do this by first creating a DataTable with the data and then using Linq to query:
[Code]....
My problem is, that the column "enddatee" has 'holes', meaning that some rows does not have a value. This means that the convertion to DateTime will fail for some rows. How can I get around that?
View 3 Replies
Feb 21, 2011
i use a datatable to populate my gridview, how do i retrieve database to datatable's column?
View 3 Replies
Feb 23, 2011
I want to loop through my datatable column called SDESCR and created a string that looks like this.
Dim labels As String() = {"North", "South", "East", "West", "Up", "Down"}
this is what i am trying and it is not working
Dim labels As String()
For Each row As DataRow In tablegraph.Rows
labels = labels " ' " + row.Item("SDESCR") + " ',"
Next row
View 6 Replies
Jan 27, 2010
I have string value in the column of datatable.I would like to assign seq no to different value.if they have the same value, I would like to assign the same seq no.if there isn't has the value in the column, then assign a new seq no.how to do this?for example:
district no. district
1 hong kong
2 germary
3 canada
1 hong kong
View 8 Replies
Jul 16, 2010
I am integrating openid in my website.I am able to retrieve data(ex email) from op provider(by query string).
But different op provider gives data in different key like gmail gives it under openid.ext1.value.alia2 key and yahoo gives it in under some different key.how should i retrieve value from query string.
View 1 Replies
Jun 27, 2010
this is the web method I'm using to convert my DataTable into JSON string:
[Code]....
But I'm not sure this is as good and as fast as it should be. I am sending to client side a JSON string format, but I think maybe there is a better way of doing this. I know there is JSON.NET
but I didn't see there any converting for DataTables.
View 5 Replies
Jun 16, 2015
[WebMethod]
public String AuthenticateUser(String username, String password)
{
con.ConnectionString = ConfigurationManager.ConnectionStrings["cn"].ConnectionString;
if (con.State == ConnectionState.Closed)
{
con.Open();
}
[code]...
Also how will i write the code on the page where i am reading the returned value from this webservice?
View 1 Replies
Jun 14, 2010
how can i dissect or retrieve string values
Here's the sample code that im working on now
private void SplitStrings()
{
List<string> listvalues = new List<string>();
listvalues = (List<string>)Session["mylist"];[code]....
now that i'am able to retrieve List values in my session, how can i separately get the values of each list using foreach or for statement? what i want to happen is to programmatically split the values of the strings depending on how many is in the list.
View 4 Replies
Nov 24, 2010
I'm loading data from my database into a DataTable, and one of the columns is a date field.
[Code]....
I'd like to format that column so that instead of containing a full date, it will be formatted like "MM/DD/YYYY".
I've tried looping through each row in the table and changing the cell for that column, but I get an error saying that the string isn't a valid DateTime object.
I tried changing the column DateType to a string, but I get an error saying I can't change the DateType after the table is filled.
How can I do this? This seems like such a simple thing, but I'm having so much trouble with it.
View 3 Replies
Jul 30, 2010
I'm having a problem with reading a string from sqlserver database and use it as the text of a label,
getDescTableAdapter gd = new
getDescTableAdapter();
Label2.Text = Convert.ToString(gd.GetDesc(pid));
what i get in the form is: getDesc ! everything is right in the dataset and if i bind it to a gridview it works fine but when i convert it to string it seems it converts the table adaptor's name instead of the value.ance
View 2 Replies
May 6, 2010
How could I parse a Json string with all the data from my table to a DataTable or a DataView?
View 5 Replies
Feb 4, 2011
My datatable consists of a column named "ID". The no. of values in this column varies.Sometimes this Datatable fetches 3 IDs in that ID column, sometimes 2. Now if for example, my datatable has three values as 1,2,3. What I want is to put these three values in a string and separate them by commas as folows:-
string test= "1,2,3";
If Datatable has 2 values, then string should be as follows:-
string test= "1,2";
I did try but in vain.
edit:-
DataTable dt=new DataTable;
dt = obj.GetIDs();
for (int i = 0; i < dt.Rows.Count; i++)
{
string test= "What should be here????";
}
edit 2
foreach(DataRow dr in dt.Rows)
{
string str = str + "," + Convert.ToString(dr("ID"));
}
@Rajeev ::Tried this..it says dr is a variable but used as a method. What's wrong?
View 4 Replies
Feb 23, 2010
i'm trying to sort a datatable using the typical select method*. The problem comes because the field is string defined but it's containing integer values.
With sql the problem will be solved just using something like:
select * from table order by to_number(field);
but of course it's not working properly with the method commented above (select method).
*http://msdn.microsoft.com/en-gb/library/b5c0xc84(VS.80).aspx
View 2 Replies
Feb 25, 2010
What is the preferred way to retrieve large(approx: 50 MB) xml string from ASP.NET webpage?
Placing the xml string in file and downloading the file is not a choice.(This should be my last resort if nothing else works)
I have following method on ASP.NET server which is exposed through WCF service to silverlight client.
[code]...
Unfortunately these xml strings are approximately 50MB to 100 MB. Silverlight client needs to retrive these large strings and store it in a file on the client machine at the path selected by the user through saveFileDialog.
My concern is WCF service will not allow such large messages. How can I address this issue?
View 3 Replies
Aug 4, 2010
The coding language is C#3.0What is the most optimum method to retrieve all hashtable keys into string separated by a delimiter ","Is the for loop or the foreach loop the only option?
Update: the keys are already strings
View 2 Replies
Dec 30, 2010
I´m having a code making some txt-files out of a query for each af a dropdownlist.
I need to name the the output file to a name including the distinct data of a column in my query.
[Code]....
The output file name should include the data from the query of agent_input36. It could be several data.
I´m trying to make an order file. The orderfile name (.txt) should include the possible names of agent_input36. It could look like. YYY_"agent_input36"_Order_"Date"_CCC.txt. Can I retrieve the data of this column from a sqlDataAdapter into a stringvalue?
View 1 Replies
Apr 7, 2010
I have an app that connects to only one db for all of the data that the app has access to. My connection string is in the Web.Config file. In each of my DAL classes I have the following code that gets the connection string from the Config file. This works with no issues but I thought there might be a better way of doing this that I don't know.
If I wanted to change the name of the connection string that any of the DAL classes would use then I would have to change the name of the connection string in each of the files. I thought about creating a new class that would hold this then I could just instantiate a new instance of the class to access this with each of the DAL classes that needs access to it. Then if I needed to change the name of the connection string then it would only be in one place. I suspect there is an even better way of doing this that i don't know about.
[Code]....
View 3 Replies
Apr 6, 2010
Is there a command to retrieve the whole string after the question mark (?) in a URL?
For instance, if I have www.joesmith.com/Test.aspx?price=10.00&name=bob&zip=38924, I want to be able to get the part of the string that says, price=10.00&name=bob&zip=38924
View 3 Replies
Jan 27, 2011
if i have url in string format like
"redirect.aspx?id=1 &name=n1 &add=abc"
is there sum in built function in asp.net to retrieve querystring values from this considering this as url.
View 7 Replies
Mar 13, 2011
I need to limit the length of the string that load into a DataTable that is being used to display. The data I am loading is coming from another DataTable. How do I shorten row["CG_GalleryName"] contents to 24 characters.
Convert.ToString(row["CG_GalleryName"]) -- how do I set this length to 24 characters? Using it in the below code.
if (Convert.ToInt16(row["rnum"]) == 1)
{
dr = GLinks.NewRow();
dr["rnum"] = row["rnum"];
dr["L_URL"] = row["L_URL"];
dr["CG_GalleryName"] = row["CG_GalleryName"];
dr["L_Picture"] = row["L_Picture"];
GLinks.Rows.Add(dr);
View 8 Replies
May 7, 2015
I have a products table with 3 fields name, price and quantity, I need to fill a datatable with those 3 fields and using a foreach build a chain. I build my chain currently using a datagrid with my following code
this code work good.
string item_name;
string amount;
string quantity;
[Code]....
but I like to form my chain directly from datatable, not rely on a datagrid.
View 1 Replies
Nov 3, 2010
I have a textbox AND 3 checkboxes; checkbox1, checkbox2, checkbox3
In textbox we have 1,2,3
If I type in textbox1 = 1,2 then
checkbox1 and checkbox2 will be checked and checkbox3 will remain unchecked.....
How to do this in vb.net
View 3 Replies
Apr 9, 2010
I have a .txt file named: myTextFile.txt on my hostingaccount that contains this string: "Hello"
Now my hostingprovider says this: "Any file that you can access via your domain can be accessed through a Secure Socket Layer (SSL) connection as well."
When I type this manually in the address field, my browser will show the string: "Hello" in the top left corner: [URL]
My question now is if it is possible programatically to write this address down in the browser and retreive this string using this Secure Socket Layer (SSL). (https://) ?
The thing is that I will implement this in a C# winform application so I will try to ask this question here as the logic hopefully could be the same.
View 4 Replies
Feb 15, 2010
Now i want to insert the grid view values(more then one datas multiple rows) and Retrive the out put and again i have to bind to the another grid in the same form. Here i have to pass that values as a XML string and how colud i have to retrive the values and how to i can bind those values in to another grid view. what kind of methods and objects i have to use, and this process ll not affect the page performance.
View 2 Replies