parameter not supplied error , using parameters.add

[Imran Aziz]

Hello All,
I have a table with few fields that allow null, I use the following code
to add entries

strQuery = "insert into tblChannelItems
(nChannelID,sItemTitle,sItemLink,sItemDesc,sItemAuthor,sItemCategory,sItemComments,sItemEnclosure,sItemPubDate)
values
(@nChannelID,@sItemTitle,@sItemLink,@sItemDesc,@sItemAuthor,@sItemCategory,@sItemComments,@sItemEnclosure,@sItemPubDate);";

strQuery = strQuery + " SELECT nItemID from tblChannelItems where
nItemID=SCOPE_IDENTITY();";

SqlCommand objCmd = new SqlCommand(strQuery, this.conn);

SqlParameter nChannelID = objCmd.Parameters.Add("@nChannelID",
SqlDbType.Int);

SqlParameter sItemTitle = objCmd.Parameters.Add("@sItemTitle",
SqlDbType.NVarChar);

SqlParameter sItemLink = objCmd.Parameters.Add("@sItemLink",
SqlDbType.NVarChar);

SqlParameter sItemDesc = objCmd.Parameters.Add("@sItemDesc",
SqlDbType.Text);

SqlParameter sItemAuthor = objCmd.Parameters.Add("@sItemAuthor",
SqlDbType.NVarChar);

SqlParameter sItemCategory = objCmd.Parameters.Add("@sItemCategory",
SqlDbType.NVarChar);

SqlParameter sItemComments = objCmd.Parameters.Add("@sItemComments",
SqlDbType.NVarChar);

SqlParameter sItemEnclosure = objCmd.Parameters.Add("@sItemEnclosure",
SqlDbType.NVarChar);

SqlParameter sItemPubDate = objCmd.Parameters.Add("@sItemPubDate",
SqlDbType.DateTime);

nChannelID.Value = objStItem.nChannelID;

sItemTitle.Value = objStItem.sItemTitle;

sItemLink.Value = objStItem.sItemLink;

sItemDesc.Value = objStItem.sItemDesc;

sItemAuthor.Value = objStItem.sItemAuthor;

sItemCategory.Value = objStItem.sItemCategory;

sItemComments.Value = objStItem.sItemComments;

sItemEnclosure.Value = objStItem.sItemEnclosure;

sItemPubDate.Value = objStItem.sItemPubDate;

nItemID = (int)objCmd.ExecuteScalar();

but I get the error of


{"Prepared statement '(@nChannelID int,@sItemTitle nvarchar(33),@sItemLink
nvarchar(50' expects parameter @sItemAuthor, which was not supplied."}

Seems although the author column is optional but still somehow since I dont
specify the parameters as optional in my prepared statement so I get this
error, can anyone please guide me how I can set these parameters as optional
, so I dont get this error?

Imran.

 

[Imran Aziz]

Now I have also added this property

sItemAuthor.IsNullable = true;



but it still throws the same error, on not including all the optional fields
in the prepared statement it works fine

what am I doing wrong ?



Imran.