how to write update query for fileupload in asp.net

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C#

try
        {              
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = connection;
            cmd.CommandTimeout = 0;


           // cmd.CommandText = "UPDATE CREDOnet_Documents.dbo.SubUnitDocs  SET FileName= '" + sFilename + "',File=" + fileData + ",ContentType='" + contentType + "' WHERE ID =16";

            cmd.CommandText = "UPDATE CREDOnet_Documents.dbo.SubUnitDocs  SET @FileName,@FileBlob,@ContentType WHERE @LeaseDocID";


            cmd.Parameters.Add("@FileName", SqlDbType.NVarChar, 200);
            cmd.Parameters.Add("@File", SqlDbType.Image);
            cmd.Parameters.Add("@ContentType", SqlDbType.NVarChar, 200);
            cmd.Parameters.Add("@UpdatedBy", SqlDbType.NVarChar, 100);
            cmd.Parameters.Add("@UpdatedOn", SqlDbType.DateTime, 200);
            cmd.Parameters.Add("@ID", SqlDbType.Int);


            cmd.Parameters["@FileName"].Value = sFilename;
            cmd.Parameters["@File"].Value = fileData;
            cmd.Parameters["@ContentType"].Value = contentType;
            cmd.Parameters["@UpdatedBy"].Value = "System";
            cmd.Parameters["@UpdatedOn"].Value = System.DateTime.Now;
            cmd.Parameters["@ID"].Value = "16";


            cmd.CommandType = CommandType.Text;
            cmd.ExecuteNonQuery();
        }
        catch
        {

        }
        finally
        {
            connection.Close();
        }

Posted 6-Jan-13 23:54pm

nrkhi401

Updated 6-Jan-13 23:59pm

__TR__

v2

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prashant patil 4987 7-Jan-13 6:02am

what error u have in above code. expain in brief..

2 solutions

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Sandeep Mewara · Answer 1 · 2013-01-07T00:04:00

Solution 1

Try:

SQL

cmd.CommandText = "UPDATE CREDOnet_Documents.dbo.SubUnitDocs  SET FileName=@FileName, File=@FileBlob, ContentT=@ContentType WHERE ID=@LeaseDocID";

Refer:
MSDN: Configuring Parameters and Parameter Data Types (ADO.NET)[^]
MSDN: DataAdapter Parameters (ADO.NET)[^]
MSDN: SqlCommand.Parameters Property [^]

Posted 7-Jan-13 0:04am

Sandeep Mewara

Updated 7-Jan-13 0:05am

v2

Comments

__TR__ 7-Jan-13 6:10am

5ed!
Congratulations for retaining MVP. :)

Sandeep Mewara 7-Jan-13 6:12am

Thanks TR. :)

__TR__ · Answer 2 · 2013-01-07T00:05:00

The update statement syntax is

SQL

UPDATE [TableName]
SET [Column1] = Value1,
    [Column2] = Value2,
    .
    .
    .
    [ColumnN] = ValueN
WHERE [Condition]

So your update statement should look like

SQL

UPDATE CREDOnet_Documents.dbo.SubUnitDocs  
SET FileName= @FileName,
File=@File,
ContentType=@ContentType
WHERE ID =@ID

Take a look at the below links if you are not familiar with update statement
UPDATE (Transact-SQL)[^]
UPDATE Basics in SQL Server[^]
SQL UPDATE Statement[^]