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copied!<p>Ideally you would just make TagID an identity field by changing the table definition. If you can't do that, next best would be:</p> <pre><code>CREATE PROCEDURE [dbo].[InsertTagProcdure] @Value nvarchar(200), @TagCount nvarchar(200) AS BEGIN BEGIN TRANSACTION DECLARE @TagID int; SELECT @TagID = coalesce((select max(TagID) + 1 from Tag), 1) COMMIT INSERT INTO Tag (TagID,Value,TagCount) VALUES (@TagID,@Value,@TagCount) END </code></pre> <p>The transaction ensures that you don't end up with unique TagIDs and the coalesce handles the special case where the table is empty and gives an initial value of 1.</p> <p><strong>EDIT:</strong></p> <p>Based on the change to your original question, the table already has an identity column so your stored procedure should be:</p> <pre><code>CREATE PROCEDURE [dbo].[InsertTagProcdure] @Value nvarchar(200), @TagCount nvarchar(200) AS BEGIN INSERT INTO Tag (Value,TagCount) VALUES (@Value,@TagCount) END </code></pre> <p>and your C# code should be</p> <p>int TagID = int.Parse(txtTagID.Text); //This should fall away so auto increment. String Value = txtValue.Text; int TagCount = int.Parse(txtCount.Text); </p> <pre><code> using (var conn = new SqlConnection(Properties.Settings.Default.DBConnectionString)) using (var cmd = conn.CreateCommand()) { conn.Open(); cmd.CommandText = "InsertTagProcdure"; cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@Value", Value); cmd.Parameters.AddWithValue("@TagCount", TagCount); cmd.ExecuteNonQuery(); } </code></pre>

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