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Write Blob File Contents To Table Row Field Snippet (ArcObjects .NET 10.4 SDK)

ArcObjects Library Reference

Write Blob File Contents To Table Row Field Snippet

[C#]

/// <summary>
/// Read the contents of a binary file and write to a Blob field in a new row of a table.
/// </summary>
/// <param name="string_Filename">A System.String that is the name of a binary file to read. Example: "C:\temp\myPicture.bmp"</param>
/// <param name="table">An ITable interface that is the table is to have a new row added and have a specified BLOB field populated.</param>
/// <param name="int32_BlobFieldIndex">A System.Int32 that is the index number of the Blob field in the Fields collection of the Table. Example: 3</param>
/// <returns>True=successful. False=unscucceeful.</returns>
/// <remarks></remarks>
public System.Boolean WriteBlobFileContentsToTableRowField(System.String string_Filename, ESRI.ArcGIS.Geodatabase.ITable table, System.Int32 int32_BlobFieldIndex)
{

    try
    {
        //Read the Blob (binary) stream from a file.
        ESRI.ArcGIS.esriSystem.IMemoryBlobStream memoryBlobStream=new ESRI.ArcGIS.esriSystem.MemoryBlobStreamClass();
        memoryBlobStream.LoadFromFile(string_Filename);

        //Add a new row to the table
        ESRI.ArcGIS.Geodatabase.IRow row=table.CreateRow();

        //Get the Blob Field from the Table.
        ESRI.ArcGIS.Geodatabase.IFields fields=row.Fields;
        ESRI.ArcGIS.Geodatabase.IField field=fields.get_Field(int32_BlobFieldIndex);

        //Test to ensure the index number specified is a Blob Field
        if (field.Type == ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeBlob)
        {

            //Write the Blob (binary) stream to the Blob Field and save
            row.set_Value(int32_BlobFieldIndex, (System.Object)memoryBlobStream);
            //row.get_Value(int32_BlobFieldIndex)=memoryBlobStream;
            row.Store();

            //success
            return true;

        }
        else
        {

            //unsuccessful
            return false;

        }
    }
    catch (System.Exception ex)
    {

        //unsuccessful with error, interrogate more
        return false;

    }

}

[Visual Basic .NET]

''' <summary>
''' Read the contents of a binary file and write to a Blob field in a new row of a table.
''' </summary>
''' <param name="string_Filename">A System.String that is the name of a binary file to read. Example: "C:\temp\myPicture.bmp"</param>
''' <param name="table">An ITable interface that is the table is to have a new row added and have a specified BLOB field populated.</param>
''' <param name="int32_BlobFieldIndex">A System.Int32 that is the index number of the Blob field in the Fields collection of the Table. Example: 3</param>
''' <returns>True=successful. False=unscucceeful.</returns>
''' <remarks></remarks>
Public Function WriteBlobFileContentsToTableRowField(ByVal string_Filename As System.String, ByVal table As ESRI.ArcGIS.Geodatabase.ITable, ByVal int32_BlobFieldIndex As System.Int32) As System.Boolean

  Try
    'Read the Blob (binary) stream from a file.
    Dim memoryBlobStream As ESRI.ArcGIS.esriSystem.IMemoryBlobStream=New ESRI.ArcGIS.esriSystem.MemoryBlobStreamClass
    memoryBlobStream.LoadFromFile(string_Filename)

    'Add a new row to the table
    Dim row As ESRI.ArcGIS.Geodatabase.IRow=table.CreateRow

    'Get the Blob Field from the Table.
    Dim fields As ESRI.ArcGIS.Geodatabase.IFields=row.Fields
    Dim field As ESRI.ArcGIS.Geodatabase.IField=fields.Field(int32_BlobFieldIndex)

    'Test to ensure the index number specified is a Blob Field
    If field.Type=ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeBlob Then

      'Write the Blob (binary) stream to the Blob Field and save
      row.Value(int32_BlobFieldIndex)=CType(memoryBlobStream, System.Object) ' Explicit Cast
      row.Store()

      'success
      Return True

    Else

      'unsuccessful
      Return False

    End If
  Catch ex As System.Exception

    'unsuccessful with error, interrogate more
    Return False

  End Try

End Function