search records through repeater in asp.net

ALTER procedure [dbo].[spsearchdocuments]
@Name  nvarchar(50)
as
SELECT     dbo.DocumentInfo.DocID as DocumentID,
 dbo.DocumentInfo.DocName as DocumentName,
 dbo.DocumentInfo.Uploadfile as FileUploaded,
   dbo.DocumentInfo.UploadedDate as UploadedDate,
 dbo.Department.DepType as Department,
dbo.DocType.DocType as Document,
dbo.DocumentInfo.UploadedBy as UploadedBy,
dbo.Approval.AppoveBy, dbo.ApproveType.ApproveType as Status
FROM         dbo.DocumentInfo INNER JOIN
                      dbo.Approval ON dbo.DocumentInfo.DocID = dbo.Approval.DocID INNER JOIN
                      dbo.ApproveType ON dbo.Approval.ApproveID = dbo.ApproveType.ApproveID INNER JOIN
                      dbo.Department ON dbo.DocumentInfo.DepID = dbo.Department.DepID INNER JOIN
                      dbo.DocType ON dbo.DocumentInfo.DocTypeID = dbo.DocType.DocTypeID
where [DocName] like @Name+'%'

public DataTable searchdcouments(string Name )
        {

            return db.ExecuteDataSet("spsearchdocuments", new object[] { Name }).Tables[0];
        }

protected void Btn_submits_Click(object sender, EventArgs e)
        {         
            Repeater4.DataSource = sear.searchdcouments(searz.Text);
            Repeater4.DataBind();           
        }