Convert A JSON Constructed From Table To A Datatable For An Update Query?

Jan 29, 2011

I would like to send json data from a HTML table to the ASP.NET code-behind and update the data in and SQL Server database. The code and JSON for the TableProductToUpdate() is below.

function UpdateProductTable() {
type: "POST",


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VS 2010 : Convert Datatable To JSON?

Mar 26, 2011

I want to be able to turn a datatable or dataset or the results of my SQL queries into JSON - purpose is for a WCF service which will not do it.

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Twitter Json - Unable To Convert To Jobject Or Jarray Using / Javascriptserializer?

May 9, 2012

I am been stuck on this for 3 days now...I have been accessing the twitter api to pull a user_timeline for a list of users and the json that comes back is impossible to work with. I tried to deserialize it using javascriptserializer and get an error:invalid object passed in , ':' or '}'

Now this is frustrating since I expect the json being returned to be error free. Then I tried and split the posts using string.split and tried to convert each post to Jobject or jarray. for Jarray I get

'unexpected end of content while loading jArray


Now I have formatted the code here and not pasted the whole file but it does look like valid json to me and I do not alter anything after receiving the stream from the twitter api. Can someone please point me in the right direction? I really need to get this stuff parsed?

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[2003] Update Unable To Find TableMapping['Table'] Or DataTable 'Table'?

Sep 26, 2008

An unhandled exception of type 'System.InvalidOperationException' occurred in in line: dbAdp.Update(dbDset) in btnSave_Click, (elseif editflag = true) blockdescription: Update unable to find TableMapping['Table'] or DataTable 'Table'I was also wondering if I could simply use the ExecuteNonQuery for the delete statement, but since I've placed my data in a datarow, I'm not sure if i can actually use it. Any thoughts on this? Btw, this is my first time using a datarow, and I've recently been studying how to use

dr = dbDset.Tables(0).Rows(CurIndex)


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Convert JSON String To JSON Object?

Jan 18, 2012

I have a JSON response from a web service that I need to be converted to an object then to an array. My response is similar to the one below:

{"status":{"error":"NO","code":"200","description":"none","message":"Request ok"},"geolocation":{"lat":"38.89515","lng":"-77.0310"},"stations":[{"country":"United States","regPrice":"0.00","midPrice":"0.00","prePrice":"0.00","streetAddress":"1401, I St[code]....

I am doing this is VB.NET within a console for now. Basically I am trying to create a simple way to test my API calls and output the information. What I am trying to accomplish is having to loop through the JSON array and list the stations.

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Convert A LINQ Query Resultset To A DataTable?

Jul 20, 2010

How can i write this query with LINQ to a FoxPro database?SELECT count(*) FROM Table group by item1I wrote it as below, but it doesn't work

Dim Query
Dim dt As New DataTable
Dim da = New Odbc.OdbcDataAdapter("SELECT * FROM table1",connection)


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Perform An Sql Query Onto A DataTable Not A Database Table?

Dec 19, 2009

How do I perform an sql query onto a DataTable not a Database table?

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Update A SQL Table From A Modified Datatable?

Feb 9, 2011

I used the DataSet Designer to create FTWDataSet which holds the AlarmText table from a SQLExpress database.This far my form contains ONLY Datagridview1.The code below successfully shows the contents of the AlarmText table plus the one added checkbox column (which I will populate with display-only data, and is not an issue here).

Dim ta As New FTWDataSetTableAdapters.AlarmTextTableAdapter
Dim dt As New FTWDataSet.AlarmTextDataTable

What else do I need to do to use the DataGridView to edit and save values in the AlarmText table?

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Update Datatable With Master Table?

Mar 11, 2010

I have followin codes

Dim dt As DataTable
Dim str As New SqlClient.SqlCommand("select code,name from employees", con)
da = New SqlClient.SqlDataAdapter(str)


How to update datatable with master table?

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Convert JSON To Array OR JSON To XML?

Jul 17, 2011

How can I convert a JSON string to an array OR a JSON string to XML in VB.NET? I know how to do this in C#, as I have read dozens of articles on it, however, I am unable to figure out how to achieve the same result in VB.NET.

I'm using the System.Web.Script namespace via System.Web.Extensions.dll (from Microsoft).

I'm willing to use an additional DLL file if needed.

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Bulk Update From A Datatable To Sql 2005 Table

Aug 25, 2011

Here is what i am doing as of now...

For i As Integer = 0 To Dt1.Rows.Count - 1
Cmd.CommandText = "UPDATE Spares SET Pur_Price=" &
Dt1.Rows(i)("Cost_Price") & ",Sell_Price=" &


However this procedure is very time consuming, i need to optimize it. I need to update 20000 rows ...

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VS 2008 How To Update Datatable With Master Table

Jan 29, 2010

[code]Invalid object name 'dt'.How to update datatable with master table?

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Using An UpdateCommand To Update An Access Table From In-memory Datatable

Dec 15, 2011

I have a table in Access with two key fields (let's call them Item and Cust). These key fields *combined* are the primary key. So each record must have a unique Item and User combination. It can have a duplicate Item with other records, and a duplicate Cust with other records, but not a duplicate of both. Because my "primary key" is a combination of two fields, I can't make a primary key on the table in Access (it only supports one field as a primary key).

I have another table in SQLServer which also has Item and Cust, but in addition, is has several descriptive fields that give more details about the Item and Cust. I'm trying to use ADO.NET to bring in that SQL Server table and UPDATE some matching fields in Access with the descriptive fields. [Code]

View 1 Replies - Update / Delete The Table Records In ASPNETDB.MDF In Single Update / Delete Query?

Nov 29, 2010

I want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?

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.net - Update 2 Table Values In One Query In LINQ?

Apr 26, 2010

I have 2 tables Table1 with columns [BId,Name,Amount] Table2 with columns [CId,BId, ExpenseType,Expense]. BId Is the foreign key in Table2. The Amount field in Table1 is always higher than Expense in Table2. I need to update the values of Amount (increase or decrease) based on value of Expense and I want to do it in single query in LINQ. Eg If the Expense has to be updated with 200, I would decrease(negate) Amount value with 200. If Expense is reduce to 100 then the Amount is increased by a value of 100.

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Parameterized Query For Insert And Update A Table In MsAccess

Jun 26, 2009

I am using following code for Insert records from LIstview to table in MsAccess:


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Convert A Two-table Exists Query From SQL To Linq Using Dynamic Fields In The Subquery?

Jun 7, 2011

I'm trying to query old Access database tables and compare them with SQL Server tables.They often don't have primary keys, or they have extra fields that had some purpose in the nineties, etc., or the new tables have new fields, etc.I need to find records - based on a set of fields specified at runtime - that are in one table but not another.So, I do this kind of query all the time in SQL, when I'm comparing data in different tables:

dim fields_i_care_about as string = "field1, field2, field3"
'This kind of thing gets set by a caller, can be any number of fields, depends on the
dim s as string= ""


It tells me it can't convert a Boolean - Is there any way to do this without Linq expressions? They seem far more complex than what I'm trying to do here, and they take a lot of code, and also I can't seem to find examples of Expressions where we're comparing two fields in a subquery.Is there a simpler way? I know I could do the usual EXISTS query using JOIN or IN - in this case I don't need the query to be super fast or anything. And I don't need to use a DataTable or DataSet - I can put the data in some other kind of object.

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Converting DataTable To JSON?

Feb 21, 2010

I'm trying to use the JavaScriptSerializer to work with this code. However it crashes when it reaches the last line;

Dim json As New String(sr.Serialize(dt))

I get this error message;

A circular reference was detected while serializing an object of type 'System.Reflection.Module'.

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JQuery - Ajax - Json - Javascriptserialize - Writes Out The Contents Of A Datatable

Aug 26, 2011

I am having a heck of a time with some very simple json. I have a very basic VB.NET webform which which writes out the contents of a datatable serizlized with JavaScriptSerializer.


On the jquery side I am doing this.


This is returning "invalid json"

Here is the output


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Read Xml And Convert To Json?

Dec 6, 2011

I recently made a transition to VS2010 from vb6, it's quite a change for me and I'm still learning most of the functionality.I have a project that reads a web server for xml files and saves them into a file directory, works great in vb6, but I haven't a slightest idea how to achieve the same thing in visual studio. I've read a whole bunch of threads on the topic and wrote a few lines of code without any success. For example there is an xml file that resides on the web [URL] how can I take it down and most importantly convert it into json? I've read about but I can't find a single example with syntax.

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SQL Query Two Tables At Once And Loop Result As JSON Objects

Dec 16, 2011

I have a MySQL database with a table called "Locations" which looks a bit like this

id | name | other parameters
1 | shop1 | blah
2 | shop2 | blah


This works, but it is inefficient calling the database through the loop, how do I avoid this?

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Loading The Contents Of DataTable Adapter Query Into A Datatable?

Nov 18, 2009

load the contents of a query from a dataTable Adapter into a datatable?

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Query A DataTable - Change The Query At Runtime (ex. Changing The Customer Name)

Oct 15, 2011

I created a RDCL in the designer. I would like the User to Determine what is shown in the Report. How can I change the query at runtime? (ex. changing the customer Name)

This is the query that I have in the properties:

SELECT [Date], Address, Customer, Orders
FROM Report_qry
WHERE (Customer= 'JohnDoe')

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Extract / Convert Values From JSON Response To A Object And Vice Versa?

Sep 14, 2011

I'm getting a JSON response after accessing a web service with my window application written in VB.NET. How can I convert the JSON response to a VB.NET object and vice versa?

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Use A Datatable As A Data Source To Update A Second Datatable Using Sql?

Aug 10, 2011

I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,

Dim dt_report As DataTable
Dim dt_report_crypt As DataTable
Using cn As


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Constructed The Pseudocode In The Right Format?

Jul 19, 2009

Does this like i have constructed the pseudocode in the right format?"Here is the question?Using pseudocode write a program that computes and displays a 15 percent tip when the price of a meal is input by the user.

Write Enter Price of Meal
Input Price
Compute the Total cost:
Set TotalPrice = Price * 0.15 + Price
Write TotalPrice

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Get Value Of A Constructed Checkbox.checkstate Value

Jun 22, 2010

im trying to get value of a constructed checkbox.checkstate value.[code]

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Convert A Datatable Using A Reference Datatable

Apr 26, 2012

I am finding difficulties to convert a datatable to a new datatable using a reference datatable. My question is confusing and I am not good at explaining things so I drew a picture (see below).I have two datatables on memory and I need to create the third datatable using the second mapping table for reference. The column names are just for example and it can't be hardcoded.

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JSON.NET Deserialize - Next JSON String - Returns Always An Empty Result

Feb 21, 2011

I'm strugling the whole day with the next JSON string


How can i deserialize this? What's wrong with the next code (

Public Class DataString
Private m_link As String
Public Property link() As String


It returns always an empty result.

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Receiving Json And Send Back Json On Server-side?

Jul 28, 2011

how to receive and send back json. Hope someone can help me on this. I understand by examples.

On my clientside, I am sending a ajax json string "name":"theName" to the server side and would like the server side to return a string saying "welcome &name ".

Client-side code
<!DOCTYPE html>


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