SqlBulkCopy error while adding data

ado.net c# datetime sqlbulkcopy sql-server

Question

I'm attempting to use SQL 2008 to batch enter data.SqlBulkCopy .

I have my table here:

IF OBJECT_ID(N'statement', N'U') IS NOT NULL
DROP TABLE [statement]
GO
CREATE TABLE [statement](
  [ID] INT IDENTITY(1, 1) NOT NULL,
  [date] DATE NOT NULL DEFAULT GETDATE(),
  [amount] DECIMAL(14,2) NOT NULL,
CONSTRAINT [PK_statement] PRIMARY KEY CLUSTERED
(
    [ID] ASC
) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

This is my code:

private DataTable GetTable()
{
    var list = new List<DataColumn>();
    list.Add(new DataColumn("amount", typeof(SqlDecimal)));
    list.Add(new DataColumn("date", typeof(SqlDateTime)));

    var table = new DataTable("statement");
    table.Columns.AddRange(list.ToArray());

    var row = table.NewRow();
    row["amount"] = (SqlDecimal)myObj.Amount; // decimal Amount { get; set; }
    row["date"] = (SqlDateTime)myObj.Date; // DateTime Date { get; set }
    table.Rows.Add(row);

    return table;
}

private void WriteData()
{
    using (var bulk = new SqlBulkCopy(strConnection, SqlBulkCopyOptions.KeepIdentity & SqlBulkCopyOptions.KeepNulls))
    {
        //table.Columns.ForEach(c => bulk.ColumnMappings.Add(new SqlBulkCopyColumnMapping(c.ColumnName, c.ColumnName)));
        bulk.BatchSize = 25;
        bulk.DestinationTableName = "statement";
        bulk.WriteToServer(GetTable()); // a table from GetTable() 
    }
}

So, I'm receiving an error:

The given value of type SqlDateTime from the data source cannot be converted to type date of the specified target column.

Why?? How can I correct that? Please, aid me!

2
17
6/21/2009 2:47:28 PM

Accepted Answer

The following code works when used with your original table script.

private static DataTable GetTable()
{
    var list = new List<DataColumn>();
    list.Add(new DataColumn("amount", typeof(Double)));
    list.Add(new DataColumn("date", typeof(DateTime)));
    var table = new DataTable("statement");
    table.Columns.AddRange(list.ToArray());

    var row = table.NewRow();
    row["amount"] = 1.2d;
    row["date"] = DateTime.Now.Date;

    table.Rows.Add(row);
    return table;
}
private static void WriteData()
{
    string strConnection = "Server=(local);Database=ScratchDb;Trusted_Connection=True;";
    using (var bulk = new SqlBulkCopy(strConnection, SqlBulkCopyOptions.KeepIdentity & SqlBulkCopyOptions.KeepNulls))
    {
        bulk.ColumnMappings.Add(new SqlBulkCopyColumnMapping("amount", "amount"));
        bulk.ColumnMappings.Add(new SqlBulkCopyColumnMapping("date", "date"));
        bulk.BatchSize = 25;
        bulk.DestinationTableName = "statement";
        bulk.WriteToServer(GetTable());
    }
}

As Amal has previously said, the Identity column necessitates the column mappings.

22
6/21/2009 7:53:08 PM

Expert Answer

SqlDateTime exemplifies the originaldatetime type. Have you tried using theDateTime type.NET in theDataTable ? I'm hoping it can convert this to either the TSQL or SQL format.datetime or date several varieties.decimal in place ofSqlDecimal .

2
6/21/2009 2:29:06 PM


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