ado

问题 I'm working with Delphi (XE3) and need to connect to a MySQL database. I'm having a strange problem that seems quite common but I still haven't entirely solved this problem. traditional solutions include: setting "Update Criteria" to adCriteriaKey. ensure your table has a primary key (and tell the ADO Table about it) problem 1: start the application, execute the code: if the new value happens to match what's already in the database, I get the error at position "B". problem 2: start the

问题 I'm working with Delphi (XE3) and need to connect to a MySQL database. I'm having a strange problem that seems quite common but I still haven't entirely solved this problem. traditional solutions include: setting "Update Criteria" to adCriteriaKey. ensure your table has a primary key (and tell the ADO Table about it) problem 1: start the application, execute the code: if the new value happens to match what's already in the database, I get the error at position "B". problem 2: start the

问题 i'm having difficult to create on query with two different database in ADO, i need to make a lot of queries with different sources, for example select from excel file with left join in access file. When i use two different excel files like the code below works fine. Dim SQL As String Dim CN As New ADODB.Connection Dim rs As New ADODB.Recordset Set CN = New ADODB.Connection Set rs = New ADODB.Recordset 'Open connection CN.Open "Provider=Microsoft.ACE.OLEDB.12.0;" & _ "Data Source=C:\ExcelTable

问题 i'm having difficult to create on query with two different database in ADO, i need to make a lot of queries with different sources, for example select from excel file with left join in access file. When i use two different excel files like the code below works fine. Dim SQL As String Dim CN As New ADODB.Connection Dim rs As New ADODB.Recordset Set CN = New ADODB.Connection Set rs = New ADODB.Recordset 'Open connection CN.Open "Provider=Microsoft.ACE.OLEDB.12.0;" & _ "Data Source=C:\ExcelTable

问题 I'm using ADO to get from excel file the table header column names. The problem is the data is returned sorted. I need it in it's original order. This is the code: _RecordsetPtr pSchema->m_pCon->OpenSchema(adSchemaColumns); // pSchema->Sort = ""; // Does not help // pSchema->Sort = "ORDINAL_POSITION"; // Crashes while (!pSchema->GetadoEOF()) { string sheetName = (char*)(_bstr_t)pSchema->Fields->GetItem("TABLE_NAME")->Value.bstrVal; if (sheetName == "MySheet") string column = (char*)(_bstr_t

问题 I want to update connection string into xml file whenever new customer is registered with the website with its details in asp.net core 3.1 My connection string format is <ConnectionStrings> <add name="myConnectionString1" connectionString="server=localhost;database=myDb1;uid=myUser1;password=myPass;" /> <add name="myConnectionString2" connectionString="server=localhost;database=myDb2;uid=myUser2;password=myPass;" /> </ConnectionStrings> I want to achieve this using c# code so on registration

问题 I have an Excel sheet that connects to a Basis database using an ODBC connection. It worked fine when we were running Excel 2010 on Windows Server 2008, but then we upgraded to Excel 2016 on Windows Server 2016, and it doesn't work anymore. Here's some code that demonstrates the problem: Public Sub cnntest() Dim cnn As ADODB.Connection Dim sql As String Dim rs As ADODB.Recordset Set cnn = New ADODB.Connection cnn.Open "DSN=redacted;UID=redacted;PWD=redacted;" sql = "SELECT ITEM FROM IC_ITM

问题 MS ACCESS 2013-2016 continuous forms show an error when adding any record past the 3rd. I have connected via ADO to SQL SERVER. I have been working on this issue for days. I am hoping there is something I can modify in my connection string, use a different library, or anything I can do in VBA to avoid building multiple workarounds in a project that has existed and grown over 20 years. Is this a known issue? Can this be fixed? Link to Continuous Form Showing Error This is the form code I am

问题 I've created a table in a SQL Server 2017 database. Then I've created a form in MS Access 2019 that use an ADO Object as "record source". On the form, there is a Textbox with the controlsource property=Field. Then, when I open the form, everything works as expected (the content of Field shows up in the Textbox, I can move the cursor backwards and forwards and so on) except for one thing: It's not possible to change, add or delete records. Create a table On SQL Server (use SSMS): CREATE TABLE

问题 I want to start using datetime2 fields in SQL Server and I need to insert into the tables via ADO from Delphi XE5. I am using TADOQuery.ExecSQL to insert and everything works fine. However most of my tables have identity columns, e.g. id integer identity(1,1) not null To save round-trips to the server, I usually use Open with two commands in the query text. The first command is the insert the second command is "select scope_identity() as scope_id" so I can retrieve the newly inserted id in